Leetcode Solution

All	Locked	Unlocked	Easy	Medium	Hard
1056	153	903	240	599	217

Table of Leetcode Solution

Title	Difficulty	Tags	Solution
0001.Two Sum	Easy (52.31%)	array, hash-table, sort	cpp, rust
0002.Add Two Numbers	Medium (42.66%)	linked-list, arithmetic	cpp
0003.Longest Substring Without Repeating Characters	Medium (34.70%)	hash-table, sliding-window	cpp
0004.Median of Two Sorted Arrays	Hard (39.79%)	array, binary-search, divide-and-conquer	cpp
0005.Longest Palindromic Substring	Medium (33.77%)	string, dynamic-programming, palindrome	cpp
0006.Zigzag Conversion	Medium (47.76%)	string	cpp
0007.Reverse Integer	Medium (28.52%)	math	cpp
0008.String to Integer (atoi)	Medium (17.18%)	math, string	cpp
0009.Palindrome Number	Easy (56.14%)	math, palindrome	cpp
0010.Regular Expression Matching	Hard (28.14%)	dynamic-programming, backtracking, string	cpp
0011.Container With Most Water	Medium (55.13%)	array, two-pointers	cpp
0012.Integer to Roman	Medium (64.59%)	greedy	cpp
0013.Roman to Integer	Easy (61.05%)	hash-table, string	cpp
0014.Longest Common Prefix	Easy (42.67%)	string, sort	cpp
0015.3Sum	Medium (34.41%)	array, two-pointers, sorting, target-sum	cpp
0016.3Sum Closest	Medium (45.79%)	array, two-pointers, sorting, target-sum	cpp
0017.Letter Combinations of a Phone Number	Medium (60.27%)	string, backtracking, depth-first-search, breadth-first-search, recursion	cpp
0018.4Sum	Medium (36.23%)	array, two-pointers, target-sum	cpp
0019.Remove Nth Node From End of List	Medium (45.15%)	linked-list, fast-slow-pointers	cpp
0020.Valid Parentheses	Easy (40.54%)	string, stack	cpp
0021.Merge Two Sorted Lists	Easy (64.18%)	linked-list	cpp
0022.Generate Parentheses	Medium (74.44%)	string, backtracking, parentheses	cpp
0023.Merge k Sorted Lists	Hard (52.59%)	linked-list, heap	cpp
0024.Swap Nodes in Pairs	Medium (64.24%)	linked-list, recursion	cpp
0025.Reverse Nodes in k-Group	Hard (58.47%)	linked-list	cpp
0026.Remove Duplicates from Sorted Array	Easy (55.42%)	array, two-pointers, in-place-algorithm	cpp
0027.Remove Element	Easy (56.58%)	array, two-pointers, in-place-algorithm	cpp
0028.Find the Index of the First Occurrence in a String	Easy (42.16%)	string
0029.Divide Two Integers	Medium (17.43%)	math, arithmetic, bit-manipulation	cpp
0030.Substring with Concatenation of All Words	Hard (32.51%)	hash-table, sliding-window, string	cpp
0031.Next Permutation	Medium (39.77%)	array, permutation	cpp
0032.Longest Valid Parentheses	Hard (34.08%)	string, dynamic-programming, stack, parentheses, subarray	cpp
0033.Search in Rotated Sorted Array	Medium (40.66%)	array, binary-search, search-in-rotated-sorted-array	cpp
0034.Find First and Last Position of Element in Sorted Array	Medium (44.19%)	array, binary-search	cpp
0035.Search Insert Position	Easy (45.77%)	array, binary-search	cpp
0036.Valid Sudoku	Medium (59.55%)	hash-table, bit-manipulation	cpp
0037.Sudoku Solver	Hard (60.92%)	hash-table, backtracking, bit-manipulation	cpp
0038.Count and Say	Medium (54.89%)	string, recursion	cpp
0039.Combination Sum	Medium (71.28%)	sort, backtracking, combination	cpp
0040.Combination Sum II	Medium (54.43%)	array, backtracking, sort, combination	cpp
0041.First Missing Positive	Hard (39.42%)	array	cpp
0042.Trapping Rain Water	Hard (61.04%)	array, two-pointers, monotonic-stack, stack	cpp
0043.Multiply Strings	Medium (40.29%)	string, arithmetic	cpp
0044.Wildcard Matching	Hard (27.85%)	dynamic-programming, backtracking, string	cpp
0045.Jump Game II	Medium (40.41%)	array, greedy	cpp
0046.Permutations	Medium (78.23%)	depth-first-search, backtracking	cpp
0047.Permutations II	Medium (59.09%)	depth-first-search, backtracking, hash-table	cpp
0048.Rotate Image	Medium (74.15%)	array, matrix	cpp
0049.Group Anagrams	Medium (68.43%)	hash-table, string, sort	cpp
0050.Pow(x, n)	Medium (34.70%)	math, divide-and-conquer, bit-manipulation	cpp
0051.N-Queens	Hard (67.99%)	backtracking	cpp
0052.N-Queens II	Hard (73.76%)	backtracking	cpp
0053.Maximum Subarray	Medium (50.72%)	divide-and-conquer, dynamic-programming, array, subarray	cpp
0054.Spiral Matrix	Medium (49.28%)	matrix, array	cpp
0055.Jump Game	Medium (38.50%)	array, greedy	cpp
0056.Merge Intervals	Medium (47.24%)	sort, interval	cpp
0057.Insert Interval	Medium (41.42%)	sort, interval, array	cpp
0058.Length of Last Word	Easy (51.26%)	string, two-pointers	cpp
0059.Spiral Matrix II	Medium (70.98%)	array, matrix	cpp
0060.Permutation Sequence	Hard (46.75%)	math, permutation	cpp
0061.Rotate List	Medium (37.64%)	linked-list, fast-slow-pointers	cpp
0062.Unique Paths	Medium (64.23%)	dynamic-programming, math	cpp
0063.Unique Paths II	Medium (41.49%)	dynamic-programming	cpp
0064.Minimum Path Sum	Medium (63.76%)	dynamic-programming	cpp
0065.Valid Number	Hard (19.72%)	string, finite-automata	cpp
0066.Plus One	Easy (45.16%)	array	cpp
0067.Add Binary	Easy (53.45%)	string, math	cpp
0068.Text Justification	Hard (43.18%)	string, greedy	cpp
0069.Sqrt(x)	Easy (38.68%)	math, binary-search	cpp
0070.Climbing Stairs	Easy (52.85%)	dynamic-programming, fibonacci-number	cpp
0071.Simplify Path	Medium (42.23%)	string, stack	cpp
0072.Edit Distance	Medium (56.31%)	string, dynamic-programming	cpp
0073.Set Matrix Zeroes	Medium (55.42%)	array	cpp
0074.Search a 2D Matrix	Medium (50.00%)	matrix, binary-search	cpp
0075.Sort Colors	Medium (62.07%)	array, two-pointers, sort	cpp
0076.Minimum Window Substring	Hard (42.90%)	hash-table, sliding-window, string	cpp
0077.Combinations	Medium (70.28%)	backtracking, divide-and-conquer, combination	cpp
0078.Subsets	Medium (77.35%)	array, backtracking, bit-manipulation, subset	cpp
0079.Word Search	Medium (42.66%)	matrix, backtracking, depth-first-search	cpp
0080.Remove Duplicates from Sorted Array II	Medium (57.95%)	in-place algorithm, array	cpp
0081.Search in Rotated Sorted Array II	Medium (37.62%)	array, binary-search, search-in-rotated-sorted-array	cpp
0082.Remove Duplicates from Sorted List II	Medium (47.34%)	linked-list	cpp
0083.Remove Duplicates from Sorted List	Easy (52.41%)	linked-list, duplicate	cpp
0084.Largest Rectangle in Histogram	Hard (44.23%)	monotonic-stack, array	cpp
0085.Maximal Rectangle	Hard (47.03%)	matrix, stack, monotonic-stack	cpp
0086.Partition List	Medium (56.17%)	linked-list	cpp
0087.Scramble String	Hard (40.03%)	string, dynamic-programming, memoization	cpp
0088.Merge Sorted Array	Easy (49.48%)	array, two-pointers	cpp
0089.Gray Code	Medium (59.07%)	hash-table, backtracking, bit-manipulation	cpp
0090.Subsets II	Medium (57.18%)	array, backtracking, bit-manipulation	cpp
0091.Decode Ways	Medium (34.81%)	string, dynamic-programming	cpp
0092.Reverse Linked List II	Medium (47.62%)	linked-list	cpp
0093.Restore IP Addresses	Medium (49.73%)	string, backtracking, depth-first-search	cpp
0094.Binary Tree Inorder Traversal	Easy (76.01%)	stack, binary-tree	cpp
0095.Unique Binary Search Trees II	Medium (57.62%)	recursion, binary-search-tree, binary-tree	cpp
0096.Unique Binary Search Trees	Medium (60.96%)	dynamic-programming, binary-search-tree, binary-tree, math	cpp
0097.Interleaving String	Medium (39.89%)	string, dynamic-programming, depth-first-search, memoization, hash-table	cpp
0098.Validate Binary Search Tree	Medium (32.87%)	binary-search-tree, binary-tree	cpp
0099.Recover Binary Search Tree	Medium (53.00%)	binary-search-tree, binary-tree, depth-first-search, sort	cpp
0100.Same Tree	Easy (61.96%)	binary-tree, depth-first-search, breadth-first-search	cpp
0101.Symmetric Tree	Easy (56.37%)	binary-tree, depth-first-search, breadth-first-search	cpp
0102.Binary Tree Level Order Traversal	Medium (67.05%)	binary-tree, breadth-first-search	cpp
0103.Binary Tree Zigzag Level Order Traversal	Medium (58.84%)	binary-tree, breadth-first-search	cpp
0104.Maximum Depth of Binary Tree	Easy (75.27%)	binary-tree, depth-first-search, breadth-first-search	cpp
0105.Construct Binary Tree from Preorder and Inorder Traversal	Medium (63.76%)	binary-tree, hash-table	cpp
0106.Construct Binary Tree from Inorder and Postorder Traversal	Medium (62.67%)	binary-tree, hash-table	cpp
0107.Binary Tree Level Order Traversal II	Medium (63.28%)	binary-tree, breadth-first-search, depth-first-search	cpp
0108.Convert Sorted Array to Binary Search Tree	Easy (71.58%)	binary-tree, array, depth-first-search	cpp
0109.Convert Sorted List to Binary Search Tree	Medium (61.80%)	linked-list, binary-search-tree, fast-slow-pointers	cpp
0110.Balanced Binary Tree	Easy (51.90%)	binary-tree, depth-first-search	cpp
0111.Minimum Depth of Binary Tree	Easy (47.76%)	binary-tree, depth-first-search, breadth-first-search	cpp
0112.Path Sum	Easy (50.24%)	binary-tree, path-sum	cpp
0113.Path Sum II	Medium (58.38%)	binary-tree, path-sum	cpp
0114.Flatten Binary Tree to Linked List	Medium (64.76%)	binary-tree, depth-first-search, linked-list	cpp
0115.Distinct Subsequences	Hard (46.77%)	dynamic-programming, string	cpp
0116.Populating Next Right Pointers in Each Node	Medium (62.56%)	binary-tree	cpp
0117.Populating Next Right Pointers in Each Node II	Medium (52.37%)	binary-tree	cpp
0118.Pascal's Triangle	Easy (74.11%)	array	cpp
0119.Pascal's Triangle II	Easy (63.90%)	array, math	cpp
0120.Triangle	Medium (56.45%)	dynamic-programming	cpp
0121.Best Time to Buy and Sell Stock	Easy (53.60%)	array, best-time-to-buy-and-sell-stock	cpp
0122.Best Time to Buy and Sell Stock II	Medium (66.32%)	array, greedy, best-time-to-buy-and-sell-stock	cpp
0123.Best Time to Buy and Sell Stock III	Hard (47.84%)	array, greedy, dynamic-programming, best-time-to-buy-and-sell-stock	cpp
0124.Binary Tree Maximum Path Sum	Hard (39.99%)	binary-tree, depth-first-search	cpp
0125.Valid Palindrome	Easy (47.30%)	string, two-pointers	cpp
0126.Word Ladder II	Hard (27.29%)	string, backtracking, breadth-first-search, depth-first-search	cpp
0127.Word Ladder	Hard (39.04%)	breadth-first-search, hash-table	cpp
0128.Longest Consecutive Sequence	Medium (47.29%)	array, hash-table, sort	cpp
0129.Sum Root to Leaf Numbers	Medium (63.68%)	binary-tree, depth-first-search, breadth-first-search	cpp
0130.Surrounded Regions	Medium (39.26%)	depth-first-search, breadth-first-search, union-find, matrix	cpp
0131.Palindrome Partitioning	Medium (67.41%)	depth-first-search, backtracking, palindrome	cpp
0132.Palindrome Partitioning II	Hard (33.89%)	dynamic-programming, palindrome, string	cpp
0133.Clone Graph	Medium (57.06%)	hash-table, depth-first-search, breadth-first-search, graph, deep-copy	cpp
0134.Gas Station	Medium (45.52%)	greedy, math	cpp
0135.Candy	Hard (43.27%)	array, greedy	cpp
0136.Single Number	Easy (72.74%)	bit-manipulation	cpp
0137.Single Number II	Medium (62.51%)	bit-manipulation	cpp
0138.Copy List with Random Pointer	Medium (55.92%)	linked-list, hash-table, design, deep-copy	cpp
0139.Word Break	Medium (46.72%)	dynamic-programming, hash-table, string	cpp
0140.Word Break II	Hard (47.85%)	depth-first-search, memorization	cpp
0141.Linked List Cycle	Easy (50.31%)	linked-list, two-pointers, hash-table, fast-slow-pointers	cpp
0142.Linked List Cycle II	Medium (51.17%)	linked-list, fast-slow-pointers	cpp
0143.Reorder List	Medium (58.51%)	linked-list, fast-slow-pointers, stack	cpp
0144.Binary Tree Preorder Traversal	Easy (69.37%)	binary-tree, stack	cpp
0145.Binary Tree Postorder Traversal	Easy (70.78%)	binary-tree	cpp
0146.LRU Cache	Medium (42.38%)	design	cpp
0147.Insertion Sort List	Medium (53.40%)	sort, linked-list	cpp
0148.Sort List	Medium (57.73%)	linked-list, merge-sort	cpp
0149.Max Points on a Line	Hard (26.62%)	hash-table, math, geometry	cpp
0150.Evaluate Reverse Polish Notation	Medium (51.26%)	stack	cpp
0151.Reverse Words in a String	Medium (41.82%)	string, two-pointers	cpp
0152.Maximum Product Subarray	Medium (35.03%)	array, dynamic-programming	cpp
0153.Find Minimum in Rotated Sorted Array	Medium (50.26%)	array, binary-search, search-in-rotated-sorted-array, divide-and-conquer	cpp
0154.Find Minimum in Rotated Sorted Array II	Hard (43.66%)	array, binary-search, search-in-rotated-sorted-array, divide-and-conquer	cpp
0155.Min Stack	Medium (54.05%)	stack, design	cpp
0156.Binary Tree Upside Down 🔒	Medium (62.71%)	binary-tree	cpp
0157.Read N Characters Given Read4 🔒	Easy (41.47%)	string, design	cpp
0158.Read N Characters Given read4 II - Call Multiple Times 🔒	Hard (42.23%)	string, design	cpp
0159.Longest Substring with At Most Two Distinct Characters 🔒	Medium (55.30%)	sliding-window, hash-table, string	cpp
0160.Intersection of Two Linked Lists	Easy (57.30%)	linked-list, two-pointers	cpp
0161.One Edit Distance 🔒	Medium (34.28%)	string	cpp
0162.Find Peak Element	Medium (45.93%)	array, binary-search	cpp
0163.Missing Ranges 🔒	Easy (33.58%)	array, interval	cpp
0164.Maximum Gap	Medium (45.79%)	sort, bucket-sort, array	cpp
0165.Compare Version Numbers	Medium (36.83%)	string, two-pointers	cpp
0166.Fraction to Recurring Decimal	Medium (24.97%)	hash-table, arithmetic	cpp
0167.Two Sum II - Input Array Is Sorted	Medium (61.16%)	array, two-pointers, binary-search	cpp
0168.Excel Sheet Column Title	Easy (40.54%)	math, string, easy	cpp
0169.Majority Element	Easy (64.78%)	sort, array, bit-manipulation, boyer-moore-voting-algorithm	cpp
0170.Two Sum III - Data structure design 🔒	Easy (38.00%)	design, hash-table, target-sum	cpp
0171.Excel Sheet Column Number	Easy (63.66%)	math	cpp
0172.Factorial Trailing Zeroes	Medium (43.28%)	math	cpp
0173.Binary Search Tree Iterator	Medium (71.88%)	design, stack, binary-tree	cpp
0174.Dungeon Game	Hard (38.07%)	dynamic-programming, matrix	cpp
0179.Largest Number	Medium (36.04%)	sort, string	cpp
0186.Reverse Words in a String II 🔒	Medium (54.52%)	string, two-pointers	cpp
0187.Repeated DNA Sequences	Medium (48.78%)	hash-table, bit-manipulation, string	cpp
0188.Best Time to Buy and Sell Stock IV	Hard (42.57%)	dynamic-programming, best-time-to-buy-and-sell-stock	cpp
0189.Rotate Array	Medium (40.50%)	array	cpp
0190.Reverse Bits	Easy (58.30%)	bit-manipulation	cpp
0191.Number of 1 Bits	Easy (70.75%)	bit-manipulation	cpp
0198.House Robber	Medium (50.95%)	dynamic-programming, array	cpp
0199.Binary Tree Right Side View	Medium (62.99%)	binary-tree	cpp
0200.Number of Islands	Medium (58.75%)	depth-first-search, breadth-first-search	cpp
0201.Bitwise AND of Numbers Range	Medium (46.86%)	bit-manipulation	cpp
0202.Happy Number	Easy (56.02%)	hash-table, math, fast-slow-pointers	cpp
0203.Remove Linked List Elements	Easy (48.63%)	linked-list	cpp
0204.Count Primes	Medium (33.56%)	math	cpp
0205.Isomorphic Strings	Easy (45.08%)	hash-table	cpp
0206.Reverse Linked List	Easy (76.41%)	linked-list	cpp
0207.Course Schedule	Medium (46.68%)	graph, topological-sort, depth-first-search, breadth-first-search	cpp
0208.Implement Trie (Prefix Tree)	Medium (64.99%)	design, trie-tree	cpp
0209.Minimum Size Subarray Sum	Medium (47.01%)	array, sliding-window, binary-search, prefix-sum	cpp
0210.Course Schedule II	Medium (50.32%)	graph, topological-sort	cpp
0211.Design Add and Search Words Data Structure	Medium (45.13%)	trie, backtracking, design, depth-first-search	cpp
0212.Word Search II	Hard (36.26%)	trie, depth-first-search, backtracking, matrix	cpp
0213.House Robber II	Medium (41.92%)	dynamic-programming	cpp
0214.Shortest Palindrome	Hard (33.37%)	string, palindrome	cpp
0215.Kth Largest Element in an Array	Medium (66.78%)	heap, sort, divide-and-conquer, partition, array	cpp
0216.Combination Sum III	Medium (69.54%)	backtracking, combination	cpp
0217.Contains Duplicate	Easy (61.59%)	array, sort, hash-table, duplicate	cpp
0218.The Skyline Problem	Hard (42.64%)	sort, multiset	cpp
0219.Contains Duplicate II	Easy (44.96%)	array, hash-table, duplicate	cpp
0220.Contains Duplicate III	Hard (22.72%)	sliding-window, ordered-map, binary-search	cpp
0221.Maximal Square	Medium (46.44%)	dynamic-programming, matrix, prefix-sum	cpp
0222.Count Complete Tree Nodes	Easy (64.95%)	binary-tree, recursion	cpp
0223.Rectangle Area	Medium (46.13%)	math, geometry	cpp
0224.Basic Calculator	Hard (43.36%)	math, design, arithmetic, basic-calculator	cpp
0225.Implement Stack using Queues	Easy (63.52%)	stack, queue, design	cpp
0226.Invert Binary Tree	Easy (76.86%)	binary-tree, recursion	cpp
0227.Basic Calculator II	Medium (43.53%)	string, basic-calculator, stack, math, arithmetic	cpp
0228.Summary Ranges	Easy (50.52%)	array	cpp
0229.Majority Element II	Medium (51.36%)	array, boyer-moore-voting-algorithm	cpp
0230.Kth Smallest Element in a BST	Medium (72.39%)	binary-tree, binary-search-tree, divide-and-conquer	cpp
0231.Power of Two	Easy (47.74%)	bit-manipulation	cpp
0232.Implement Queue using Stacks	Easy (66.16%)	stack, queue, design	cpp
0233.Number of Digit One	Hard (34.56%)	math, digit	cpp
0234.Palindrome Linked List	Easy (53.06%)	linked-list, fast-slow-pointers, stack, recursion	cpp
0235.Lowest Common Ancestor of a Binary Search Tree	Medium (64.58%)	binary-search-tree	cpp
0236.Lowest Common Ancestor of a Binary Tree	Medium (62.02%)	binary-tree	cpp
0237.Delete Node in a Linked List	Medium (78.35%)	linked-list	cpp
0238.Product of Array Except Self	Medium (66.09%)	array	cpp
0239.Sliding Window Maximum	Hard (46.55%)	heap, sliding-window, monotonic-stack, deque, multiset	cpp
0240.Search a 2D Matrix II	Medium (52.54%)	binary-search, matrix	cpp
0241.Different Ways to Add Parentheses	Medium (65.35%)	divide-and-conquer, memoization	cpp
0242.Valid Anagram	Easy (64.43%)	hash-table	cpp
0243.Shortest Word Distance 🔒	Easy (65.30%)	string, two-pointers	cpp
0244.Shortest Word Distance II 🔒	Medium (61.16%)	design, hash-table, two-pointers	cpp
0245.Shortest Word Distance III 🔒	Medium (58.42%)	string, two-pointers	cpp
0246.Strobogrammatic Number 🔒	Easy (47.68%)	two-pointers	cpp
0247.Strobogrammatic Number II 🔒	Medium (52.23%)	recursion, string	cpp
0248.Strobogrammatic Number III 🔒	Hard (42.11%)	string, recursion	cpp
0249.Group Shifted Strings 🔒	Medium (65.51%)	hash-table, string	cpp
0250.Count Univalue Subtrees 🔒	Medium (56.38%)	binary-tree, depth-first-search	cpp
0251.Flatten 2D Vector 🔒	Medium (49.45%)	design, two-pointers	cpp
0252.Meeting Rooms 🔒	Easy (58.02%)	sort, interval	cpp
0253.Meeting Rooms II 🔒	Medium (51.22%)	array, difference-array, interval	cpp
0254.Factor Combinations 🔒	Medium (49.47%)	backtracking, math	cpp
0255.Verify Preorder Sequence in Binary Search Tree 🔒	Medium (49.51%)	monotonic-stack, binary-search-tree, binary-tree	cpp
0256.Paint House 🔒	Medium (62.41%)	dynamic-programming	cpp
0257.Binary Tree Paths	Easy (63.51%)	binary-tree, depth-first-search	cpp
0258.Add Digits	Easy (66.53%)	math	cpp
0259.3Sum Smaller 🔒	Medium (50.71%)	array, two-pointers, sort	cpp
0260.Single Number III	Medium (68.35%)	bit-manipulation	cpp
0261.Graph Valid Tree 🔒	Medium (48.03%)	tree, graph, union-find	cpp
0263.Ugly Number	Easy (41.95%)	easy	cpp
0264.Ugly Number II	Medium (46.18%)	heap, math, dynamic-programming	cpp
0265.Paint House II 🔒	Hard (54.60%)	dynamic-programming	cpp
0266.Palindrome Permutation 🔒	Easy (67.15%)	string, hash-table, palindrome, permutation	cpp
0267.Palindrome Permutation II 🔒	Medium (41.32%)	string, permutation, palindrome, backtracking, hash-table	cpp
0268.Missing Number	Easy (66.68%)	math, array, bit-manipulation, binary-search	cpp
0269.Alien Dictionary 🔒	Hard (35.72%)	graph, topological-sort, string	cpp
0270.Closest Binary Search Tree Value 🔒	Easy (51.80%)	binary-search-tree, binary-tree, recursion	cpp
0271.Encode and Decode Strings 🔒	Medium (46.31%)	string, design	cpp
0272.Closest Binary Search Tree Value II 🔒	Hard (59.01%)	stack, queue, binary-search-tree, binary-tree	cpp
0273.Integer to English Words	Hard (30.56%)	math, string, hash-table	cpp
0274.H-Index	Medium (38.89%)	sort, array, hash-table	cpp
0275.H-Index II	Medium (38.09%)	binary-search	cpp
0276.Paint Fence 🔒	Medium (46.53%)	dynamic-programming	cpp
0277.Find the Celebrity 🔒	Medium (47.14%)	array, graph	cpp
0278.First Bad Version	Easy (44.33%)	binary-search	cpp
0279.Perfect Squares	Medium (54.75%)	math, dynamic-programming	cpp
0280.Wiggle Sort 🔒	Medium (67.64%)	sort, array	cpp
0281.Zigzag Iterator 🔒	Medium (63.78%)	design	cpp
0282.Expression Add Operators	Hard (39.82%)	recursion, string	cpp
0283.Move Zeroes	Easy (61.71%)	array, two-pointers, in-place-algorithm	cpp
0284.Peeking Iterator	Medium (59.44%)	design	cpp
0285.Inorder Successor in BST 🔒	Medium (49.63%)	binary-search-tree, binary-tree, stack, recursion	cpp
0286.Walls and Gates 🔒	Medium (61.31%)	breadth-first-search	cpp
0287.Find the Duplicate Number	Medium (60.69%)	array, duplicate, binary-search, bit-manipulation, fast-slow-pointers	cpp
0288.Unique Word Abbreviation 🔒	Medium (26.22%)	hash-table, string	cpp
0289.Game of Life	Medium (69.02%)	matrix, bit-manipulation, in-place-algorithm	cpp
0290.Word Pattern	Easy (42.00%)	hash-table, string	cpp
0291.Word Pattern II 🔒	Medium (47.58%)	backtracking, string, hash-table	cpp
0292.Nim Game	Easy (56.81%)	math, game-theory	cpp
0293.Flip Game 🔒	Easy (64.56%)	string	cpp
0294.Flip Game II 🔒	Medium (52.12%)	game, backtracking	cpp
0295.Find Median from Data Stream	Hard (51.86%)	design, heap	cpp
0296.Best Meeting Point 🔒	Hard (60.90%)	math, sort	cpp
0297.Serialize and Deserialize Binary Tree	Hard (56.66%)	binary-tree, design, serialization	cpp
0298.Binary Tree Longest Consecutive Sequence 🔒	Medium (53.46%)	binary-tree, depth-first-search	cpp
0299.Bulls and Cows	Medium (50.24%)	hash-table	cpp
0300.Longest Increasing Subsequence	Medium (55.23%)	array, dynamic-programming, greedy, binary-search	cpp
0301.Remove Invalid Parentheses	Hard (48.14%)	breadth-first-search, hash-table, parentheses, TODO	cpp
0302.Smallest Rectangle Enclosing Black Pixels 🔒	Hard (58.87%)	binary-search, matrix, geometry	cpp
0303.Range Sum Query - Immutable	Easy (63.17%)	prefix-sum, math, array, interval	cpp
0304.Range Sum Query 2D - Immutable	Medium (54.46%)	prefix-sum, math, matrix, interval	cpp
0305.Number of Islands II 🔒	Hard (39.59%)	union-find	cpp
0306.Additive Number	Medium (31.53%)	backtracking, string	cpp
0307.Range Sum Query - Mutable	Medium (40.93%)	array, interval, binary-indexed-tree	cpp
0308.Range Sum Query 2D - Mutable 🔒	Hard (44.01%)	matrix, interval, binary-indexed-tree
0309.Best Time to Buy and Sell Stock with Cooldown	Medium (58.03%)	dynamic-programming, best-time-to-buy-and-sell-stock	cpp
0310.Minimum Height Trees	Medium (38.88%)	tree, graph, topological-sort	cpp
0311.Sparse Matrix Multiplication 🔒	Medium (68.06%)	math, matrix	cpp
0312.Burst Balloons	Hard (58.68%)	dynamic-programming	cpp
0313.Super Ugly Number	Medium (45.25%)	heap, math, dynamic-programming	cpp
0314.Binary Tree Vertical Order Traversal 🔒	Medium (54.18%)	binary-tree, breadth-first-search, depth-first-search	cpp
0315.Count of Smaller Numbers After Self	Hard (42.41%)	sort, binary-indexed-tree, interval, merge-sort, hash-table, segment-tree	cpp
0316.Remove Duplicate Letters	Medium (49.58%)	stack, greedy, hash-table, string	cpp
0317.Shortest Distance from All Buildings 🔒	Hard (43.13%)	breadth-first-search	cpp
0318.Maximum Product of Word Lengths	Medium (59.93%)	bit-manipulation	cpp
0319.Bulb Switcher	Medium (52.72%)	math, brainteaser	cpp
0320.Generalized Abbreviation 🔒	Medium (58.36%)	string, depth-first-search	cpp
0321.Create Maximum Number	Hard (30.01%)	greedy	cpp
0322.Coin Change	Medium (43.81%)	dynamic-programming, memoization, depth-first-search, coin-change	cpp
0323.Number of Connected Components in an Undirected Graph 🔒	Medium (62.76%)	graph, depth-first-search, union-find	cpp
0324.Wiggle Sort II	Medium (34.28%)	sort, array, two-pointers, partition	cpp
0325.Maximum Size Subarray Sum Equals k 🔒	Medium (49.48%)	hash-table, prefix-sum	cpp
0326.Power of Three	Easy (46.50%)	math	cpp
0327.Count of Range Sum	Hard (35.90%)	array, interval, merge-sort, binary-indexed-tree, segment-tree, hash-table	cpp
0328.Odd Even Linked List	Medium (61.39%)	linked-list	cpp
0329.Longest Increasing Path in a Matrix	Hard (53.53%)	depth-first-search, breadth-first-search, memoization	cpp
0330.Patching Array	Hard (41.72%)	greedy	cpp
0331.Verify Preorder Serialization of a Binary Tree	Medium (45.18%)	stack	cpp
0332.Reconstruct Itinerary	Hard (43.24%)	graph, depth-first-search, sort, stack	cpp
0333.Largest BST Subtree 🔒	Medium (43.73%)	binary-tree, depth-first-search	cpp
0334.Increasing Triplet Subsequence	Medium (40.00%)	array	cpp
0335.Self Crossing	Hard (30.43%)	math, geometry	cpp
0336.Palindrome Pairs	Hard (35.27%)	hash-table, string, ordered-set	cpp
0337.House Robber III	Medium (54.23%)	binary-tree, depth-first-search	cpp
0338.Counting Bits	Easy (78.20%)	bit-manipulation, dynamic-programming	cpp
0339.Nested List Weight Sum 🔒	Medium (83.47%)	depth-first-search, breadth-first-search	cpp
0340.Longest Substring with At Most K Distinct Characters 🔒	Medium (48.78%)	string, hash-table, sliding-window	cpp
0341.Flatten Nested List Iterator	Medium (64.43%)	design, stack, queue, depth-first-search	cpp
0342.Power of Four	Easy (47.94%)	bit-manipulation, math	cpp
0343.Integer Break	Medium (60.29%)	math	cpp
0344.Reverse String	Easy (77.76%)	two-pointers, string	cpp
0345.Reverse Vowels of a String	Easy (52.91%)	two-pointers, string	cpp
0346.Moving Average from Data Stream 🔒	Easy (78.24%)	queue, design	cpp
0347.Top K Frequent Elements	Medium (62.74%)	hash-table, heap	cpp
0348.Design Tic-Tac-Toe 🔒	Medium (57.93%)	design, hash-table	cpp
0349.Intersection of Two Arrays	Easy (74.39%)	hash-table, two-pointers, binary-search, sort, set	cpp
0350.Intersection of Two Arrays II	Easy (56.45%)	hash-table, sort, two-pointers	cpp
0351.Android Unlock Patterns 🔒	Medium (51.81%)	depth-first-search	cpp
0352.Data Stream as Disjoint Intervals	Hard (59.98%)	interval, ordered-map	cpp
0353.Design Snake Game 🔒	Medium (38.73%)	design, queue, hash-table	cpp
0354.Russian Doll Envelopes	Hard (37.11%)	binary-search, sort, greedy	cpp
0355.Design Twitter	Medium (39.32%)	design, hash-table, heap	cpp
0356.Line Reflection 🔒	Medium (35.44%)	hash-table, geometry	cpp
0357.Count Numbers with Unique Digits	Medium (52.86%)	math, backtracking	cpp
0358.Rearrange String k Distance Apart 🔒	Hard (38.62%)	heap, greedy, hash-table	cpp
0359.Logger Rate Limiter 🔒	Easy (75.84%)	design, hash-table	cpp
0360.Sort Transformed Array 🔒	Medium (55.69%)	math, two-pointers	cpp
0361.Bomb Enemy 🔒	Medium (51.72%)	matrix	cpp
0362.Design Hit Counter 🔒	Medium (68.64%)	design, binary-search	cpp
0363.Max Sum of Rectangle No Larger Than K	Hard (44.11%)	binary-search, matrix, prefix-sum, ordered-set	cpp
0364.Nested List Weight Sum II 🔒	Medium (65.28%)	depth-first-search	cpp
0365.Water and Jug Problem	Medium (40.21%)	math	cpp
0366.Find Leaves of Binary Tree 🔒	Medium (80.54%)	binary-tree, depth-first-search	cpp
0367.Valid Perfect Square	Easy (43.61%)	math, binary-search	cpp
0368.Largest Divisible Subset	Medium (45.24%)	math, dynamic-programming	cpp
0369.Plus One Linked List 🔒	Medium (61.02%)	linked-list, recursion	cpp
0370.Range Addition 🔒	Medium (71.55%)	difference-array	cpp
0371.Sum of Two Integers	Medium (51.78%)	bit-manipulation, arithmetic	cpp
0372.Super Pow	Medium (35.20%)	math	cpp
0373.Find K Pairs with Smallest Sums	Medium (39.98%)	heap, sort, array	cpp
0374.Guess Number Higher or Lower	Easy (53.39%)	binary-search	cpp
0375.Guess Number Higher or Lower II	Medium (48.83%)	dynamic-programming	cpp
0376.Wiggle Subsequence	Medium (48.45%)	dynamic-programming, greedy	cpp
0377.Combination Sum IV	Medium (54.13%)	dynamic-programming, array, combination	cpp
0378.Kth Smallest Element in a Sorted Matrix	Medium (62.38%)	binary-search, matrix	cpp
0379.Design Phone Directory 🔒	Medium (51.65%)	design, hash-table	cpp
0380.Insert Delete GetRandom O(1)	Medium (54.41%)	array, hash-table, design, random	cpp
0381.Insert Delete GetRandom O(1) - Duplicates allowed	Hard (35.44%)	array, hash-table, design, random	cpp
0382.Linked List Random Node	Medium (63.13%)	random, reservoir-sampling	cpp
0383.Ransom Note	Easy (61.20%)	hash-table, string, easy	cpp
0384.Shuffle an Array	Medium (58.28%)	random	cpp
0385.Mini Parser	Medium (38.03%)	string, stack, recursion	cpp
0386.Lexicographical Numbers	Medium (63.77%)	math, string, depth-first-search	cpp
0387.First Unique Character in a String	Easy (62.09%)	hash-table	cpp
0388.Longest Absolute File Path	Medium (47.24%)	stack, hash-table	cpp
0389.Find the Difference	Easy (59.77%)	hash-table	cpp
0390.Elimination Game	Medium (45.70%)	math	cpp
0391.Perfect Rectangle	Hard (33.63%)	hash-table, geometry, hard	cpp
0392.Is Subsequence	Easy (47.93%)	string, two-pointers	cpp
0393.UTF-8 Validation	Medium (45.11%)	bit-manipulation	cpp
0394.Decode String	Medium (59.08%)	stack, string	cpp
0395.Longest Substring with At Least K Repeating Characters	Medium (44.96%)	string, sliding-window, hash-table	cpp
0396.Rotate Function	Medium (42.45%)	math	cpp
0397.Integer Replacement	Medium (35.70%)	bit-manipulation, math, recursion	cpp
0398.Random Pick Index	Medium (63.18%)	random, hash-table, reservoir-sampling	cpp
0399.Evaluate Division	Medium (61.62%)	union-find, graph, depth-first-search	cpp
0400.Nth Digit	Medium (34.75%)	math	cpp
0401.Binary Watch	Easy (54.15%)	bit-manipulation	cpp
0402.Remove K Digits	Medium (31.73%)	stack, greedy	cpp
0403.Frog Jump	Hard (46.01%)	binary-search, hash-table, depth-first-search, memoization	cpp
0404.Sum of Left Leaves	Easy (57.80%)	binary-tree	cpp
0405.Convert a Number to Hexadecimal	Easy (48.31%)	bit-manipulation	cpp
0406.Queue Reconstruction by Height	Medium (73.40%)	sort	cpp
0407.Trapping Rain Water II	Hard (47.89%)	heap, breadth-first-search	cpp
0408.Valid Word Abbreviation 🔒	Easy (35.65%)	string, two-pointers	cpp
0409.Longest Palindrome	Easy (53.90%)	hash-table, string, palindrome	cpp
0410.Split Array Largest Sum	Hard (55.20%)	binary-search, dynamic-programming, prefix-sum, array, target-sum	cpp
0411.Minimum Unique Word Abbreviation 🔒	Hard (39.71%)	heap, bit-manipulation, string	cpp
0412.Fizz Buzz	Easy (72.00%)	easy	cpp
0413.Arithmetic Slices	Medium (65.04%)	math, dynamic-programming	cpp
0414.Third Maximum Number	Easy (34.76%)	array	cpp
0415.Add Strings	Easy (51.71%)	string, arithmetic, two-pointers	cpp
0416.Partition Equal Subset Sum	Medium (46.25%)	dynamic-programming, bit-manipulation, array, target-sum	cpp
0417.Pacific Atlantic Water Flow	Medium (55.15%)	depth-first-search, breadth-first-search, matrix	cpp
0418.Sentence Screen Fitting 🔒	Medium (36.10%)	greedy	cpp
0419.Battleships in a Board	Medium (75.30%)	matrix	cpp
0420.Strong Password Checker	Hard (13.60%)	string, hard, heap	cpp
0421.Maximum XOR of Two Numbers in an Array	Medium (53.32%)	bit-manipulation, trie, array	cpp
0422.Valid Word Square 🔒	Easy (40.91%)	matrix, string	cpp
0423.Reconstruct Original Digits from English	Medium (51.10%)	string, math	cpp
0424.Longest Repeating Character Replacement	Medium (53.72%)	string, sliding-window	cpp
0425.Word Squares 🔒	Hard (53.30%)	trie, backtracking, string	cpp
0426.Convert Binary Search Tree to Sorted Doubly Linked List 🔒	Medium (64.77%)	binary-tree, binary-search-tree, linked-list, recursion	cpp
0427.Construct Quad Tree	Medium (75.29%)	matrix, depth-first-search	cpp
0428.Serialize and Deserialize N-ary Tree 🔒	Hard (66.89%)	tree, depth-first-search, breadth-first-search, design, serialization	cpp
0429.N-ary Tree Level Order Traversal	Medium (70.82%)	tree, breadth-first-search, depth-first-search	cpp
0430.Flatten a Multilevel Doubly Linked List	Medium (60.03%)	linked-list, stack, recursion	cpp
0431.Encode N-ary Tree to Binary Tree 🔒	Hard (79.41%)	binary-tree, tree, recursion	cpp
0432.All O`one Data Structure	Hard (36.73%)	hash-table, design, linked-list	cpp
0433.Minimum Genetic Mutation	Medium (53.59%)	breadth-first-search	cpp
0434.Number of Segments in a String	Easy (36.40%)	string	cpp
0435.Non-overlapping Intervals	Medium (53.13%)	sort, greedy, interval	cpp
0436.Find Right Interval	Medium (51.99%)	sort, array, binary-search, interval	cpp
0437.Path Sum III	Medium (46.43%)	binary-tree, hash-table, depth-first-search, prefix-sum	cpp
0438.Find All Anagrams in a String	Medium (50.86%)	sliding-window, hash-table	cpp
0439.Ternary Expression Parser 🔒	Medium (60.77%)	stack, string	cpp
0440.K-th Smallest in Lexicographical Order	Hard (32.14%)	tree, depth-first-search	cpp
0441.Arranging Coins	Easy (46.55%)	math, binary-search	cpp
0442.Find All Duplicates in an Array	Medium (75.66%)	array, duplicate	cpp
0443.String Compression	Medium (54.27%)	two-pointers	cpp
0444.Sequence Reconstruction 🔒	Medium (28.08%)	graph, topological-sort	cpp
0445.Add Two Numbers II	Medium (61.12%)	linked-list, arithmetic	cpp
0446.Arithmetic Slices II - Subsequence	Hard (54.58%)	dynamic-programming, hash-table	cpp
0447.Number of Boomerangs	Medium (55.40%)	hash-table, math	cpp
0448.Find All Numbers Disappeared in an Array	Easy (60.91%)	array, hash-table	cpp
0449.Serialize and Deserialize BST	Medium (57.62%)	binary-search-tree, binary-tree, design, monotonous-stack, serialization	cpp
0450.Delete Node in a BST	Medium (51.17%)	binary-search-tree, binary-tree, recursion	cpp
0451.Sort Characters By Frequency	Medium (72.51%)	hash-table, heap, sort, string, bucket-sort	cpp
0452.Minimum Number of Arrows to Burst Balloons	Medium (58.87%)	interval, greedy, sort	cpp
0453.Minimum Moves to Equal Array Elements	Medium (56.69%)	array, math	cpp
0454.4Sum II	Medium (57.23%)	hash-table	cpp
0455.Assign Cookies	Easy (52.67%)	greedy	cpp
0456.132 Pattern	Medium (33.75%)	monotonic-stack, array	cpp
0457.Circular Array Loop	Medium (33.92%)	fast-slow-pointers, array	cpp
0458.Poor Pigs	Hard (59.75%)	math	cpp
0459.Repeated Substring Pattern	Easy (46.07%)	string	cpp
0460.LFU Cache	Hard (44.11%)	design	cpp
0461.Hamming Distance	Easy (75.37%)	bit-manipulation	cpp
0462.Minimum Moves to Equal Array Elements II	Medium (60.10%)	sort, partition	cpp
0463.Island Perimeter	Easy (70.35%)	geometry	cpp
0464.Can I Win	Medium (29.66%)	depth-first-search, memoization, minimax	cpp
0465.Optimal Account Balancing 🔒	Hard (49.56%)	bit-manipulation, dynamic-programming	cpp
0466.Count The Repetitions	Hard (30.12%)	string, hard	cpp
0467.Unique Substrings in Wraparound String	Medium (39.56%)	dynamic-programming	cpp
0468.Validate IP Address	Medium (26.95%)	string	cpp
0469.Convex Polygon 🔒	Medium (39.38%)	math, geometry	cpp
0470.Implement Rand10() Using Rand7()	Medium (45.97%)	math, random	cpp
0471.Encode String with Shortest Length 🔒	Hard (50.43%)	string, dynamic-programming	cpp
0472.Concatenated Words	Hard (49.46%)	string, trie, depth-first-search	cpp
0473.Matchsticks to Square	Medium (40.24%)	depth-first-search, dynamic-programming, bit-manipulation, backtracking	cpp
0474.Ones and Zeroes	Medium (47.53%)	dynamic-programming, depth-first-search, memoization	cpp
0475.Heaters	Medium (37.73%)	binary-search, sort	cpp
0476.Number Complement	Easy (67.60%)	bit-manipulation	cpp
0477.Total Hamming Distance	Medium (52.55%)	bit-manipulation	cpp
0478.Generate Random Point in a Circle	Medium (39.78%)	geometry, random, math	cpp
0479.Largest Palindrome Product	Hard (33.18%)	math, palindrome	cpp
0480.Sliding Window Median	Hard (39.25%)	sliding-window, multiset, heap, hash-table, hard	cpp
0481.Magical String	Medium (51.20%)	math, string	cpp
0482.License Key Formatting	Easy (43.72%)	string	cpp
0483.Smallest Good Base	Hard (40.44%)	math, binary-search, hard	cpp
0484.Find Permutation 🔒	Medium (66.86%)	string, permutation, greedy	cpp
0485.Max Consecutive Ones	Easy (58.89%)	array	cpp
0486.Predict the Winner	Medium (55.45%)	minimax, dynamic-programming, game-theory, depth-first-search, memoization	cpp
0487.Max Consecutive Ones II 🔒	Medium (50.33%)	array, sliding-window	cpp
0488.Zuma Game	Hard (32.92%)	recursion, depth-first-search, memoization	cpp
0489.Robot Room Cleaner 🔒	Hard (76.67%)	depth-first-search	cpp
0490.The Maze 🔒	Medium (57.78%)	breadth-first-search	cpp
0491.Non-decreasing Subsequences	Medium (60.65%)	depth-first-search, array	cpp
0492.Construct the Rectangle	Easy (57.37%)	math, geometry	cpp
0493.Reverse Pairs	Hard (30.57%)	array, merge-sort, binary-indexed-tree, segment-tree, hash-table	cpp
0494.Target Sum	Medium (46.70%)	dynamic-programming, array, arithmetic	cpp
0495.Teemo Attacking	Easy (56.56%)	array	cpp
0496.Next Greater Element I	Easy (72.13%)	array, stack, monotonic-stack, hash-table	cpp
0497.Random Point in Non-overlapping Rectangles	Medium (39.95%)	prefix-sum, random, binary-search	cpp
0498.Diagonal Traverse	Medium (60.06%)	matrix	cpp
0499.The Maze III 🔒	Hard (48.67%)	breadth-first-search	cpp
0500.Keyboard Row	Easy (70.61%)	hash-table	cpp
0501.Find Mode in Binary Search Tree	Easy (56.03%)	binary-search-tree, binary-tree	cpp
0502.IPO	Hard (49.55%)	heap, sort, greedy	cpp
0503.Next Greater Element II	Medium (63.78%)	monotonic-stack, array	cpp
0504.Base 7	Easy (49.89%)	math	cpp
0505.The Maze II 🔒	Medium (53.35%)	breadth-first-search	cpp
0506.Relative Ranks	Easy (63.70%)	array, sort, heap, ordered-map, hash-table	cpp
0507.Perfect Number	Easy (40.16%)	math	cpp
0508.Most Frequent Subtree Sum	Medium (66.27%)	binary-tree, hash-table, depth-first-search	cpp
0509.Fibonacci Number	Easy (70.93%)	fibonacci, dynamic-programming	cpp
0510.Inorder Successor in BST II 🔒	Medium (60.92%)	binary-tree, binary-search-tree	cpp
0513.Find Bottom Left Tree Value	Medium (71.09%)	binary-tree, depth-first-search, breadth-first-search	cpp
0514.Freedom Trail	Hard (47.72%)	dynamic-programming, depth-first-search, memoization	cpp
0515.Find Largest Value in Each Tree Row	Medium (65.66%)	binary-tree, depth-first-search, breadth-first-search	cpp
0516.Longest Palindromic Subsequence	Medium (62.52%)	dynamic-programming, palindrome	cpp
0517.Super Washing Machines	Hard (41.14%)	math, greedy	cpp
0518.Coin Change II	Medium (63.76%)	dynamic-programming, coin-change	cpp
0519.Random Flip Matrix	Medium (41.82%)	random, design, array	cpp
0520.Detect Capital	Easy (56.50%)	string	cpp
0521.Longest Uncommon Subsequence I	Easy (60.69%)	string	cpp
0522.Longest Uncommon Subsequence II	Medium (41.28%)	string, sort, two-pointers	cpp
0523.Continuous Subarray Sum	Medium (28.87%)	prefix-sum, hash-table	cpp
0524.Longest Word in Dictionary through Deleting	Medium (51.16%)	two-pointers, sort, string	cpp
0525.Contiguous Array	Medium (48.93%)	hash-table, array, prefix-sum	cpp
0526.Beautiful Arrangement	Medium (64.24%)	permutation, recursion	cpp
0527.Word Abbreviation 🔒	Hard (60.95%)	trie, string	cpp
0528.Random Pick with Weight	Medium (46.73%)	prefix-sum, random, binary-search	cpp
0529.Minesweeper	Medium (66.54%)	matrix, depth-first-search, design	cpp
0530.Minimum Absolute Difference in BST	Easy (58.39%)	binary-search-tree, binary-tree	cpp
0531.Lonely Pixel I 🔒	Medium (62.26%)	matrix	cpp
0532.K-diff Pairs in an Array	Medium (42.70%)	array, hash-table	cpp
0533.Lonely Pixel II 🔒	Medium (48.59%)	matrix, array	cpp
0535.Encode and Decode TinyURL	Medium (86.33%)	hash-table, design	cpp
0536.Construct Binary Tree from String 🔒	Medium (56.81%)	binary-tree, string, recursion	cpp
0537.Complex Number Multiplication	Medium (71.75%)	math, string, arithmetic	cpp
0538.Convert BST to Greater Tree	Medium (68.94%)	binary-search-tree, binary-tree, stack	cpp
0539.Minimum Time Difference	Medium (56.81%)	string, array, sort, bitmap	cpp
0540.Single Element in a Sorted Array	Medium (59.01%)	binary-search, bit-manipulation, duplicate	cpp
0541.Reverse String II	Easy (50.63%)	string	cpp
0542.01 Matrix	Medium (48.33%)	breadth-first-search, matrix, dynamic-programming	cpp
0543.Diameter of Binary Tree	Easy (60.21%)	binary-tree, depth-first-search	cpp
0544.Output Contest Matches 🔒	Medium (77.11%)	array	cpp
0545.Boundary of Binary Tree 🔒	Medium (45.32%)	binary-tree	cpp
0546.Remove Boxes	Hard (47.74%)	depth-first-search, memoization, hard	cpp
0547.Number of Provinces	Medium (66.08%)	graph, union-find	cpp
0548.Split Array with Equal Sum 🔒	Hard (50.11%)	prefix-sum, hash-table	cpp
0549.Binary Tree Longest Consecutive Sequence II 🔒	Medium (49.47%)	binary-tree, depth-first-search	cpp
0551.Student Attendance Record I	Easy (48.72%)	string, regex	cpp
0552.Student Attendance Record II	Hard (42.71%)	depth-first-search, memoization	cpp
0553.Optimal Division	Medium (60.69%)	math	cpp
0554.Brick Wall	Medium (54.72%)	hash-table	cpp
0555.Split Concatenated Strings 🔒	Medium (43.46%)	greedy, string	cpp
0556.Next Greater Element III	Medium (34.02%)	permutation, string	cpp
0557.Reverse Words in a String III	Easy (83.03%)	string, stack, two-pointers	cpp
0558.Logical OR of Two Binary Grids Represented as Quad-Trees	Medium (49.55%)	tree, depth-first-search	cpp
0559.Maximum Depth of N-ary Tree	Easy (72.11%)	tree, depth-first-search	cpp
0560.Subarray Sum Equals K	Medium (43.54%)	array, hash-table, prefix-sum	cpp
0561.Array Partition	Easy (78.71%)	array, sort	cpp
0562.Longest Line of Consecutive One in Matrix 🔒	Medium (50.36%)	dynamic-programming, matrix	cpp
0563.Binary Tree Tilt	Easy (61.69%)	binary-tree, depth-first-search	cpp
0564.Find the Closest Palindrome	Hard (22.28%)	palindrome, string	cpp
0565.Array Nesting	Medium (56.34%)	array	cpp
0566.Reshape the Matrix	Easy (63.08%)	matrix	cpp
0567.Permutation in String	Medium (44.33%)	sliding-window, hash-table, string	cpp
0568.Maximum Vacation Days 🔒	Hard (45.57%)	dynamic-programming	cpp
0572.Subtree of Another Tree	Easy (47.78%)	binary-tree, depth-first-search	cpp
0573.Squirrel Simulation 🔒	Medium (57.10%)	planning, greedy	cpp
0575.Distribute Candies	Easy (67.58%)	hash-table	cpp
0576.Out of Boundary Paths	Medium (48.07%)	dynamic-programming, depth-first-search, memoization, matrix	cpp
0581.Shortest Unsorted Continuous Subarray	Medium (36.81%)	array, sort, two-pointers, sliding-window	cpp
0582.Kill Process 🔒	Medium (69.27%)	tree, graph, depth-first-search	cpp
0583.Delete Operation for Two Strings	Medium (61.47%)	string, dynamic-programming	cpp
0587.Erect the Fence	Hard (51.92%)	geometry	cpp
0588.Design In-Memory File System 🔒	Hard (48.14%)	design, hash-table, trie	cpp
0589.N-ary Tree Preorder Traversal	Easy (75.46%)	stack, tree	cpp
0590.N-ary Tree Postorder Traversal	Easy (77.84%)	stack, tree	cpp
0591.Tag Validator	Hard (38.14%)	string, stack	cpp
0592.Fraction Addition and Subtraction	Medium (53.15%)	math, string, arithmetic, greatest-common-divisor	cpp
0593.Valid Square	Medium (43.99%)	math, hash-table, geometry	cpp
0594.Longest Harmonious Subsequence	Easy (54.60%)	hash-table, array, ordered-map, sliding-window, sort	cpp
0598.Range Addition II	Easy (56.04%)	math, matrix	cpp
0599.Minimum Index Sum of Two Lists	Easy (55.26%)	hash-table, string	cpp
0600.Non-negative Integers without Consecutive Ones	Hard (39.71%)	math, dynamic-programming, bit-manipulation	cpp
0604.Design Compressed String Iterator 🔒	Easy (39.74%)	design, string	cpp
0605.Can Place Flowers	Easy (29.25%)	array, greedy	cpp
0606.Construct String from Binary Tree	Medium (69.13%)	binary-tree, string	cpp
0609.Find Duplicate File in System	Medium (67.62%)	hash-table, string	cpp
0611.Valid Triangle Number	Medium (51.09%)	binary-search, array, sort, two-pointers	cpp
0616.Add Bold Tag in String 🔒	Medium (49.67%)	string, trie	cpp
0617.Merge Two Binary Trees	Easy (78.91%)	binary-tree, depth-first-search	cpp
0621.Task Scheduler	Medium (59.85%)	array, hash-table, greedy	cpp
0622.Design Circular Queue	Medium (51.41%)	design, queue, linked-list, array	cpp
0623.Add One Row to Tree	Medium (59.63%)	binary-tree, depth-first-search, breadth-first-search	cpp
0624.Maximum Distance in Arrays	Medium (42.41%)	array	cpp
0625.Minimum Factorization 🔒	Medium (33.59%)	greedy, math	cpp
0628.Maximum Product of Three Numbers	Easy (45.30%)	sort, math, array, greedy	cpp
0629.K Inverse Pairs Array	Hard (50.04%)	dynamic-programming, array, math	cpp
0630.Course Schedule III	Hard (40.18%)	greedy, heap	cpp
0631.Design Excel Sum Formula 🔒	Hard (43.69%)	design, matrix	cpp
0632.Smallest Range Covering Elements from K Lists	Hard (62.41%)	heap, hash-table, sort, sliding-window	cpp
0633.Sum of Square Numbers	Medium (33.97%)	math, two-pointers	cpp
0634.Find the Derangement of An Array 🔒	Medium (41.95%)	dynamic-programming	cpp
0635.Design Log Storage System 🔒	Medium (61.39%)	string, design, ordered-map, binary-search	cpp
0636.Exclusive Time of Functions	Medium (62.44%)	stack	cpp
0637.Average of Levels in Binary Tree	Easy (72.43%)	binary-tree	cpp
0638.Shopping Offers	Medium (52.17%)	memorization, recursion	cpp
0639.Decode Ways II	Hard (30.69%)	dynamic-programming	cpp
0640.Solve the Equation	Medium (43.73%)	math, string	cpp
0641.Design Circular Deque	Medium (56.86%)	design, queue, linked-list, array	cpp
0642.Design Search Autocomplete System 🔒	Hard (48.89%)	trie, string, design, sort	cpp
0643.Maximum Average Subarray I	Easy (43.26%)	array, sliding-window, prefix-sum	cpp
0644.Maximum Average Subarray II 🔒	Hard (36.64%)	binary-search, array, prefix-sum	cpp
0645.Set Mismatch	Easy (44.54%)	hash-table, math, in-place	cpp
0646.Maximum Length of Pair Chain	Medium (59.76%)	dynamic-programming, greedy, sort	cpp
0647.Palindromic Substrings	Medium (70.05%)	string, dynamic-programming, palindrome, manacher	cpp
0648.Replace Words	Medium (62.82%)	hash-table, trie, sort	cpp
0649.Dota2 Senate	Medium (47.53%)	greedy, queue	cpp
0650.2 Keys Keyboard	Medium (54.06%)	dynamic-programming, math	cpp
0651.4 Keys Keyboard 🔒	Medium (56.09%)	dynamic-programming	cpp
0652.Find Duplicate Subtrees	Medium (59.38%)	binary-tree, serialization	cpp
0653.Two Sum IV - Input is a BST	Easy (61.20%)	binary-search-tree, binary-tree, hash-table	cpp
0654.Maximum Binary Tree	Medium (85.32%)	binary-tree, array, monotonic-stack, divide-and-conquer	cpp
0655.Print Binary Tree	Medium (63.42%)	binary-tree	cpp
0656.Coin Path 🔒	Hard (32.05%)	dynamic-programming	cpp
0657.Robot Return to Origin	Easy (75.68%)	easy	cpp
0658.Find K Closest Elements	Medium (47.31%)	binary-search, two-pointers	cpp
0659.Split Array into Consecutive Subsequences	Medium (51.03%)	hash-table, greedy	cpp
0660.Remove 9 🔒	Hard (57.42%)	math	cpp
0661.Image Smoother	Easy (67.23%)	matrix	cpp
0662.Maximum Width of Binary Tree	Medium (42.95%)	binary-tree	cpp
0663.Equal Tree Partition 🔒	Medium (41.47%)	binary-tree, depth-first-search, hash-table	cpp
0664.Strange Printer	Hard (54.96%)	dynamic-programming, depth-first-search, memoization	cpp
0665.Non-decreasing Array	Medium (24.66%)	array	cpp
0666.Path Sum IV 🔒	Medium (60.94%)	binary-tree, hash-table	cpp
0667.Beautiful Arrangement II	Medium (60.13%)	array, greedy, math, brainteaser	cpp
0668.Kth Smallest Number in Multiplication Table	Hard (51.62%)	matrix, binary-search	cpp
0669.Trim a Binary Search Tree	Medium (66.26%)	binary-search-tree, binary-tree, depth-first-search	cpp
0670.Maximum Swap	Medium (48.58%)	math, greedy	cpp
0671.Second Minimum Node In a Binary Tree	Easy (44.50%)	binary-tree, depth-first-search	cpp
0672.Bulb Switcher II	Medium (50.07%)	math, bit-manipulation	cpp
0673.Number of Longest Increasing Subsequence	Medium (47.90%)	array, dynamic-programming	cpp
0674.Longest Continuous Increasing Subsequence	Easy (50.17%)	array	cpp
0675.Cut Off Trees for Golf Event	Hard (34.30%)	sort, breadth-first-search, heap	cpp
0676.Implement Magic Dictionary	Medium (57.33%)	hash-table, string, trie, design, depth-first-search	cpp
0677.Map Sum Pairs	Medium (56.70%)	trie, hash-table, design, string, ordered-map	cpp
0678.Valid Parenthesis String	Medium (37.87%)	string, dynamic-programming, greedy	cpp
0679.24 Game	Hard (49.32%)	depth-first-search, arithmetic	cpp
0680.Valid Palindrome II	Easy (40.56%)	string, palindrome, two-pointers	cpp
0681.Next Closest Time 🔒	Medium (46.58%)	string	cpp
0682.Baseball Game	Easy (76.06%)	stack	cpp
0683.K Empty Slots 🔒	Hard (37.04%)	ordered-set	cpp
0684.Redundant Connection	Medium (62.78%)	graph, tree, union-find, breadth-first-search, depth-first-search	cpp
0685.Redundant Connection II	Hard (34.38%)	graph, union-find, tree, hard	cpp
0686.Repeated String Match	Medium (34.95%)	string	cpp
0687.Longest Univalue Path	Medium (41.41%)	binary-tree, recursion	cpp
0688.Knight Probability in Chessboard	Medium (56.15%)	dynamic-programming, depth-first-search, memoization	cpp
0689.Maximum Sum of 3 Non-Overlapping Subarrays	Hard (49.84%)	prefix-sum, dyanmic-programming	cpp
0690.Employee Importance	Medium (66.72%)	hash-table, depth-first-search, breadth-first-search, graph	cpp
0691.Stickers to Spell Word	Hard (48.29%)	dynamic-programming, string, bit-manipulation	cpp
0692.Top K Frequent Words	Medium (57.93%)	hash-table, heap, ordered-set, sort, bucket-sort	cpp
0693.Binary Number with Alternating Bits	Easy (62.34%)	bit-manipulation	cpp
0694.Number of Distinct Islands 🔒	Medium (61.19%)	depth-first-search, hash-table	cpp
0695.Max Area of Island	Medium (71.93%)	matrix, depth-first-search	cpp
0696.Count Binary Substrings	Easy (65.54%)	string, dynamic-programming	cpp
0697.Degree of an Array	Easy (56.53%)	array, hash-table	cpp
0698.Partition to K Equal Sum Subsets	Medium (38.45%)	depth-first-search, backtracking, sort	cpp
0699.Falling Squares	Hard (44.88%)	segment-tree, interval, ordered-map, hard	cpp
0700.Search in a Binary Search Tree	Easy (79.55%)	binary-search-tree, binary-tree, recursion	cpp
0701.Insert into a Binary Search Tree	Medium (73.77%)	binary-search-tree, binary-tree, recursion	cpp
0702.Search in a Sorted Array of Unknown Size 🔒	Medium (72.07%)	binary-search, array	cpp
0703.Kth Largest Element in a Stream	Easy (56.75%)	heap, design	cpp
0704.Binary Search	Easy (57.39%)	binary-search	cpp
0705.Design HashSet	Easy (66.91%)	design, hash-table, array, linked-list, bit-manipulation	cpp
0706.Design HashMap	Easy (65.66%)	design, hash-table, array, linked-list	cpp
0707.Design Linked List	Medium (28.15%)	design, linked-list	cpp
0708.Insert into a Sorted Circular Linked List 🔒	Medium (35.96%)	linked-list	cpp
0709.To Lower Case	Easy (83.27%)	string, easy	cpp
0710.Random Pick with Blacklist	Hard (33.42%)	array, hash-table, random	cpp
0711.Number of Distinct Islands II 🔒	Hard (52.92%)	sort, hash-table, depth-first-search, geometry	cpp
0712.Minimum ASCII Delete Sum for Two Strings	Medium (65.05%)	dynamic-programming, string	cpp
0713.Subarray Product Less Than K	Medium (51.27%)	array, sliding-window	cpp
0714.Best Time to Buy and Sell Stock with Transaction Fee	Medium (68.44%)	array, dynamic-programming, depth-first-search, memoization	cpp
0715.Range Module	Hard (44.17%)	segment-tree, ordered-map, interval, hard, design	cpp
0716.Max Stack 🔒	Hard (45.03%)	design, stack, linked-list, ordered-map	cpp
0717.1-bit and 2-bit Characters	Easy (45.26%)	array, dynamic-programming	cpp
0718.Maximum Length of Repeated Subarray	Medium (50.96%)	array, dynamic-programming	cpp
0719.Find K-th Smallest Pair Distance	Hard (37.83%)	sort, binary-search, two-pointers, sliding-window	cpp
0720.Longest Word in Dictionary	Medium (52.34%)	string, trie, hash-table, sort, greedy, depth-first-search, breadth-first-search	cpp
0721.Accounts Merge	Medium (57.05%)	breadth-first-search, union-find	cpp
0722.Remove Comments	Medium (38.54%)	string	cpp
0723.Candy Crush 🔒	Medium (76.89%)	matrix, design, two-pointers	cpp
0724.Find Pivot Index	Easy (57.37%)	prefix-sum, math, array	cpp
0725.Split Linked List in Parts	Medium (64.00%)	linked-list	cpp
0726.Number of Atoms	Hard (52.76%)	hash-table, stack	cpp
0727.Minimum Window Subsequence 🔒	Hard (43.38%)	string, dynamic-programming	cpp
0728.Self Dividing Numbers	Easy (78.48%)	math, easy	cpp
0729.My Calendar I	Medium (56.55%)	array, interval, ordered-map, binary-search	cpp
0730.Count Different Palindromic Subsequences	Hard (45.30%)	string, dynamic-programming, palindrome, hard	cpp
0731.My Calendar II	Medium (55.35%)	interval, ordered-map, difference-array, segment-tree	cpp
0732.My Calendar III	Hard (71.57%)	interval, ordered-map, difference-array, segment-tree	cpp
0733.Flood Fill	Easy (63.78%)	matrix, depth-first-search	cpp
0734.Sentence Similarity 🔒	Easy (44.26%)	array, hash-table, string	cpp
0735.Asteroid Collision	Medium (44.53%)	stack	cpp
0736.Parse Lisp Expression	Hard (51.70%)	string, hash-table, recursion, stack	cpp
0737.Sentence Similarity II 🔒	Medium (49.87%)	union-find, string, graph	cpp
0738.Monotone Increasing Digits	Medium (47.94%)	greedy, string	cpp
0739.Daily Temperatures	Medium (65.98%)	array, stack, monotonic-stack	cpp
0740.Delete and Earn	Medium (56.49%)	dynamic-programming	cpp
0741.Cherry Pickup	Hard (36.72%)	dynamic-programming, matrix, hard	cpp
0742.Closest Leaf in a Binary Tree 🔒	Medium (46.17%)	graph, binary-tree, breadth-first-search, depth-first-search	cpp
0743.Network Delay Time	Medium (53.61%)	graph, dijkstra, heap, shortest-path	cpp
0744.Find Smallest Letter Greater Than Target	Easy (51.95%)	binary-search	cpp
0745.Prefix and Suffix Search	Hard (41.03%)	hash-table, string	cpp
0746.Min Cost Climbing Stairs	Easy (65.57%)	dynamic-programming, memoization, depth-first-search	cpp
0747.Largest Number At Least Twice of Others	Easy (48.74%)	array	cpp
0748.Shortest Completing Word	Easy (59.85%)	hash-table, string	cpp
0749.Contain Virus	Hard (50.84%)	breadth-first-search, hash-table, greedy, hard	cpp
0750.Number Of Corner Rectangles 🔒	Medium (67.69%)	hash-table, matrix	cpp
0751.IP to CIDR 🔒	Medium (55.06%)	bit-manipulation, greedy	cpp
0752.Open the Lock	Medium (56.02%)	breadth-first-search, hash-table	cpp
0753.Cracking the Safe	Hard (56.75%)	hash-table, graph, greedy	cpp
0754.Reach a Number	Medium (42.99%)	math	cpp
0755.Pour Water 🔒	Medium (46.79%)	array	cpp
0756.Pyramid Transition Matrix	Medium (52.65%)	depth-first-search, memoization	cpp
0757.Set Intersection Size At Least Two	Hard (44.35%)	sort, greedy, array, interval	cpp
0758.Bold Words in String 🔒	Medium (51.40%)	string, trie	cpp
0759.Employee Free Time 🔒	Hard (72.07%)	sort, array, interval	cpp
0760.Find Anagram Mappings 🔒	Easy (83.61%)	array	cpp
0761.Special Binary String	Hard (61.02%)	sort, recursion	cpp
0762.Prime Number of Set Bits in Binary Representation	Easy (69.32%)	bit-manipulation	cpp
0763.Partition Labels	Medium (79.82%)	string, greedy, string	cpp
0764.Largest Plus Sign	Medium (48.17%)	matrix	cpp
0765.Couples Holding Hands	Hard (57.17%)	union-find, greedy, graph	cpp
0766.Toeplitz Matrix	Easy (68.92%)	matrix	cpp
0767.Reorganize String	Medium (54.53%)	greedy, hash-table	cpp
0768.Max Chunks To Make Sorted II	Hard (53.18%)	sort, monotonic-stack, stack, array	cpp
0769.Max Chunks To Make Sorted	Medium (58.36%)	greedy, array	cpp
0770.Basic Calculator IV	Hard (55.31%)	string, basic-calculator, stack, math, arithmetic	cpp
0771.Jewels and Stones	Easy (88.53%)	hash-table	cpp
0772.Basic Calculator III 🔒	Hard (50.49%)	string, basic-calculator, stack, math, arithmetic	cpp
0773.Sliding Puzzle	Hard (64.68%)	breadth-first-search, hash-table	cpp
0774.Minimize Max Distance to Gas Station 🔒	Hard (52.22%)	binary-search	cpp
0775.Global and Local Inversions	Medium (42.46%)	array, sort, math	cpp
0776.Split BST 🔒	Medium (82.80%)	binary-search-tree, binary-tree	cpp
0777.Swap Adjacent in LR String	Medium (36.80%)	string, two-pointers	cpp
0778.Swim in Rising Water	Hard (60.64%)	matrix, heap, breadth-first search	cpp
0779.K-th Symbol in Grammar	Medium (46.44%)	array, binary-tree, recursion	cpp
0780.Reaching Points	Hard (33.14%)	array, math	cpp
0781.Rabbits in Forest	Medium (53.39%)	hash-table, array	cpp
0782.Transform to Chessboard	Hard (50.90%)	hard, matrix	cpp
0783.Minimum Distance Between BST Nodes	Easy (59.53%)	binary-search-tree, binary-tree	cpp
0784.Letter Case Permutation	Medium (74.14%)	permutation, bit-manipulation, backtracking	cpp
0785.Is Graph Bipartite?	Medium (55.55%)	graph, breadth-first-search, depth-first-search, union-find	cpp
0786.K-th Smallest Prime Fraction	Medium (53.76%)	binary-search, heap, two-pointers, array	cpp
0787.Cheapest Flights Within K Stops	Medium (39.27%)	graph, bellman-ford, memoization, depth-first-search, shortest-path	cpp
0788.Rotated Digits	Medium (56.41%)	math, dynamic-programming	cpp
0789.Escape The Ghosts	Medium (61.68%)	geometry, math	cpp
0790.Domino and Tromino Tiling	Medium (50.71%)	array, dynamic-programming	cpp
0791.Custom Sort String	Medium (70.59%)	string, hash-table, sort	cpp
0792.Number of Matching Subsequences	Medium (51.08%)	binary-search, hash-table, string	cpp
0793.Preimage Size of Factorial Zeroes Function	Hard (44.17%)	math, binary-search	cpp
0794.Valid Tic-Tac-Toe State	Medium (34.76%)	array	cpp
0795.Number of Subarrays with Bounded Maximum	Medium (53.12%)	array, sliding-window, math	cpp
0796.Rotate String	Easy (57.94%)	string, kmp	cpp
0797.All Paths From Source to Target	Medium (82.41%)	graph, breadth-first-search, depth-first-search	cpp
0798.Smallest Rotation with Highest Score	Hard (51.08%)	difference-array, array, math, hard	cpp
0799.Champagne Tower	Medium (58.10%)	array	cpp
0800.Similar RGB Color 🔒	Easy (67.36%)	string	cpp
0801.Minimum Swaps To Make Sequences Increasing	Hard (39.86%)	dynamic-programming, array	cpp
0802.Find Eventual Safe States	Medium (62.35%)	depth-first-search, graph, topological-sort	cpp
0803.Bricks Falling When Hit	Hard (34.69%)	depth-first-search, union-find, matrix, hash-table, hard	cpp
0804.Unique Morse Code Words	Easy (82.81%)	string, hash-table, easy	cpp
0805.Split Array With Same Average	Hard (25.38%)	math, bit-manipulation, hard	cpp
0806.Number of Lines To Write String	Easy (68.15%)	string, easy	cpp
0807.Max Increase to Keep City Skyline	Medium (86.08%)	geometry	cpp
0808.Soup Servings	Medium (54.05%)	dynamic-programming, depth-first-search, memoization	cpp
0809.Expressive Words	Medium (46.10%)	two-pointers, string	cpp
0810.Chalkboard XOR Game	Hard (59.13%)	math, game-theory	cpp
0811.Subdomain Visit Count	Medium (76.13%)	hash-table, string	cpp
0812.Largest Triangle Area	Easy (60.43%)	math, geometry	cpp
0813.Largest Sum of Averages	Medium (53.43%)	dynamic-programming, recursion, memoization, array	cpp
0814.Binary Tree Pruning	Medium (72.17%)	binary-tree, depth-first-search	cpp
0815.Bus Routes	Hard (47.97%)	breadth-first-search	cpp
0816.Ambiguous Coordinates	Medium (56.68%)	string	cpp
0817.Linked List Components	Medium (56.84%)	hash-table, linked-list	cpp
0818.Race Car	Hard (43.60%)	math, bit-manipulation, breadth-first-search, dynamic-programming, hash-table	cpp
0819.Most Common Word	Easy (44.35%)	hash-table, string	cpp
0820.Short Encoding of Words	Medium (60.44%)	hash-table, string, sort	cpp
0821.Shortest Distance to a Character	Easy (71.51%)	array	cpp
0822.Card Flipping Game	Medium (47.19%)	hash-table, array	cpp
0823.Binary Trees With Factors	Medium (52.92%)	math, dynamic-programming, binary-tree	cpp
0824.Goat Latin	Easy (68.12%)	string	cpp
0825.Friends Of Appropriate Ages	Medium (47.35%)	array, prefix-sum	cpp
0826.Most Profit Assigning Work	Medium (46.23%)	dynamic-programming, greedy	cpp
0827.Making A Large Island	Hard (47.01%)	matrix, union-find	cpp
0828.Count Unique Characters of All Substrings of a Given String	Hard (52.28%)	hash-table, math, string	cpp
0829.Consecutive Numbers Sum	Hard (41.81%)	array, math	cpp
0830.Positions of Large Groups	Easy (52.19%)	string, two-pointers	cpp
0831.Masking Personal Information	Medium (48.53%)	string	cpp
0832.Flipping an Image	Easy (81.79%)	matrix, bit-manipulation	cpp
0833.Find And Replace in String	Medium (52.77%)	string, hash-table	cpp
0834.Sum of Distances in Tree	Hard (59.30%)	graph, tree, depth-first-search	cpp
0835.Image Overlap	Medium (63.65%)	matrix, hash-table	cpp
0836.Rectangle Overlap	Easy (44.70%)	geometry, math	cpp
0837.New 21 Game	Medium (45.01%)	math, depth-first-search, memoization, hard	cpp
0838.Push Dominoes	Medium (57.10%)	array	cpp
0839.Similar String Groups	Hard (54.81%)	string, union-find	cpp
0840.Magic Squares In Grid	Medium (38.93%)	matrix	cpp
0841.Keys and Rooms	Medium (72.86%)	graph, depth-first-search, breadth-first-search	cpp
0842.Split Array into Fibonacci Sequence	Medium (39.02%)	backtracking, string	cpp
0843.Guess the Word	Hard (39.45%)	game	cpp
0844.Backspace String Compare	Easy (49.13%)	stack, string, two-pointers	cpp
0845.Longest Mountain in Array	Medium (40.28%)	array	cpp
0846.Hand of Straights	Medium (55.82%)	ordered-map, array	cpp
0847.Shortest Path Visiting All Nodes	Hard (65.54%)	bit-manipulation, breadth-first-search, heap, hash-table	cpp
0848.Shifting Letters	Medium (44.77%)	prefix-sum	cpp
0849.Maximize Distance to Closest Person	Medium (48.05%)	array	cpp
0850.Rectangle Area II	Hard (54.12%)	line-sweep, segment-tree, hard	cpp
0851.Loud and Rich	Medium (59.19%)	graph, depth-first-search	cpp
0852.Peak Index in a Mountain Array	Medium (68.45%)	array, binary-search	cpp
0853.Car Fleet	Medium (50.88%)	sort, greedy, ordered-map, heap	cpp
0854.K-Similar Strings	Hard (39.78%)	breadth-first-search, string	cpp
0855.Exam Room	Medium (43.28%)	ordered-set, unordered-map, sort, interval, design	cpp
0856.Score of Parentheses	Medium (64.21%)	stack, string, parentheses	cpp
0857.Minimum Cost to Hire K Workers	Hard (52.89%)	array, heap, greedy	cpp
0858.Mirror Reflection	Medium (62.68%)	math, greatest-common-divisor	cpp
0859.Buddy Strings	Easy (33.07%)	string	cpp
0860.Lemonade Change	Easy (53.21%)	greedy	cpp
0861.Score After Flipping Matrix	Medium (74.92%)	greedy	cpp
0862.Shortest Subarray with Sum at Least K	Hard (26.00%)	array, prefix-sum, monotonic-queue, hard	cpp
0863.All Nodes Distance K in Binary Tree	Medium (64.36%)	binary-tree, depth-first-search, breadth-first-search, hash-table	cpp
0864.Shortest Path to Get All Keys	Hard (53.77%)	bit-manipulation, breadth-first-search	cpp
0865.Smallest Subtree with all the Deepest Nodes	Medium (70.47%)	binary-tree	cpp
0866.Prime Palindrome	Medium (25.92%)	palindrome, prime, math	cpp
0867.Transpose Matrix	Easy (71.29%)	easy	cpp
0868.Binary Gap	Easy (63.26%)	bit-manipulation	cpp
0869.Reordered Power of 2	Medium (62.77%)	math	cpp
0870.Advantage Shuffle	Medium (52.45%)	array, sort, greedy, heap	cpp
0871.Minimum Number of Refueling Stops	Hard (40.03%)	dynamic-programming, heap	cpp
0872.Leaf-Similar Trees	Easy (70.21%)	binary-tree, depth-first-search	cpp
0873.Length of Longest Fibonacci Subsequence	Medium (48.41%)	array, dynamic-programming, hash-table	cpp
0874.Walking Robot Simulation	Medium (39.92%)	hash-table	cpp
0875.Koko Eating Bananas	Medium (48.91%)	binary-search	cpp
0876.Middle of the Linked List	Easy (78.33%)	linked-list, fast-slow-pointers	cpp
0877.Stone Game	Medium (70.54%)	dynamic-programming, minmax, math	cpp
0878.Nth Magical Number	Hard (35.37%)	math, binary-search	cpp
0879.Profitable Schemes	Hard (48.39%)	array, dynamic-programming	cpp
0880.Decoded String at Index	Medium (36.42%)	string	cpp
0881.Boats to Save People	Medium (56.62%)	greedy, two-pointers	cpp
0882.Reachable Nodes In Subdivided Graph	Hard (50.19%)	graph, dijkstra, shortest-path	cpp
0883.Projection Area of 3D Shapes	Easy (72.40%)	geometry, math	cpp
0884.Uncommon Words from Two Sentences	Easy (67.19%)	hash-table, string	cpp
0885.Spiral Matrix III	Medium (74.36%)	matrix	cpp
0886.Possible Bipartition	Medium (50.52%)	graph, union-find	cpp
0887.Super Egg Drop	Hard (27.62%)	memoization, depth-first-search, binary-search	cpp
0888.Fair Candy Swap	Easy (61.58%)	hash-table	cpp
0889.Construct Binary Tree from Preorder and Postorder Traversal	Medium (71.34%)	binary-tree, hash-table, recursion	cpp
0890.Find and Replace Pattern	Medium (76.88%)	hash-table, string	cpp
0891.Sum of Subsequence Widths	Hard (37.73%)	math, sort	cpp
0892.Surface Area of 3D Shapes	Easy (65.69%)	geometry	cpp
0893.Groups of Special-Equivalent Strings	Medium (71.59%)	hash-table, string	cpp
0894.All Possible Full Binary Trees	Medium (82.70%)	binary-tree, hash-table, recursion	cpp
0895.Maximum Frequency Stack	Hard (66.48%)	heap, hash-table, design	cpp
0896.Monotonic Array	Easy (61.11%)	array, easy	cpp
0897.Increasing Order Search Tree	Easy (78.27%)	binary-tree, binary-search-tree	cpp
0898.Bitwise ORs of Subarrays	Medium (38.52%)	array, hash-table	cpp
0899.Orderly Queue	Hard (65.95%)	math, string	cpp
0900.RLE Iterator	Medium (59.46%)	design, string	cpp
0901.Online Stock Span	Medium (65.75%)	array, monotonic-stack	cpp
0902.Numbers At Most N Given Digit Set	Hard (42.37%)	depth-first-search, memoization, digit, string, hard	cpp
0903.Valid Permutations for DI Sequence	Hard (57.41%)	dynamic-programming, array	cpp
0904.Fruit Into Baskets	Medium (44.14%)	hash-table, sliding-window	cpp
0905.Sort Array By Parity	Easy (76.22%)	array, two-pointers, partition	cpp
0906.Super Palindromes	Hard (38.85%)	palindrome, math, string	cpp
0907.Sum of Subarray Minimums	Medium (37.41%)	array, monotonic-stack, dynamic-programming, stack, math	cpp
0908.Smallest Range I	Easy (69.86%)	math	cpp
0909.Snakes and Ladders	Medium (43.81%)	breadth-first-search	cpp
0910.Smallest Range II	Medium (36.18%)	math, sort	cpp
0911.Online Election	Medium (51.96%)	binary-search, hash-table	cpp
0912.Sort an Array	Medium (56.68%)	sort, TODO	cpp
0913.Cat and Mouse	Hard (34.07%)	breadth-first search, graph, queue, minimax, game-theory, hard	cpp
0914.X of a Kind in a Deck of Cards	Easy (30.02%)	math	cpp
0915.Partition Array into Disjoint Intervals	Medium (48.77%)	array	cpp
0916.Word Subsets	Medium (52.30%)	hash-table, string	cpp
0917.Reverse Only Letters	Easy (64.33%)	string, two-pointers	cpp
0918.Maximum Sum Circular Subarray	Medium (44.67%)	dynamic-programming, array, prefix-sum	cpp
0919.Complete Binary Tree Inserter	Medium (65.43%)	queue, array, binary-tree, design	cpp
0920.Number of Music Playlists	Hard (60.54%)	dynamic-programming	cpp
0921.Minimum Add to Make Parentheses Valid	Medium (75.12%)	string, parentheses, stack, greedy	cpp
0922.Sort Array By Parity II	Easy (70.71%)	array, two-pointers	cpp
0923.3Sum With Multiplicity	Medium (45.40%)	math, sort, two-pointers, hash-table, dynamic-programming	cpp
0924.Minimize Malware Spread	Hard (42.00%)	breadth-first-search, union-find, graph	cpp
0925.Long Pressed Name	Easy (32.35%)	string, two-pointers	cpp
0926.Flip String to Monotone Increasing	Medium (61.40%)	string	cpp
0927.Three Equal Parts	Hard (39.75%)	array, bit-manipulation, math	cpp
0928.Minimize Malware Spread II	Hard (43.41%)	union-find, graph, breadth-first-search	cpp
0929.Unique Email Addresses	Easy (67.12%)	string, hash-table	cpp
0930.Binary Subarrays With Sum	Medium (62.06%)	array, prefix-sum, hash-table, sliding-window	cpp
0931.Minimum Falling Path Sum	Medium (64.44%)	dynamic-programming	cpp
0932.Beautiful Array	Medium (65.65%)	array, divide-and-conquer, math	cpp
0933.Number of Recent Calls	Easy (74.93%)	queue, binary-search	cpp
0934.Shortest Bridge	Medium (57.68%)	depth-first-search, breadth-first-search	cpp
0935.Knight Dialer	Medium (59.99%)	math, dynamic-programming, matrix	cpp
0936.Stamping The Sequence	Hard (62.49%)	greedy, string	cpp
0937.Reorder Data in Log Files	Medium (56.40%)	string, sort	cpp
0938.Range Sum of BST	Easy (86.79%)	binary-search-tree, binary-tree, depth-first-search	cpp
0939.Minimum Area Rectangle	Medium (53.53%)	ordered-map, hash-table, sort	cpp
0940.Distinct Subsequences II	Hard (43.15%)	dynamic-programming, string	cpp
0941.Valid Mountain Array	Easy (33.40%)	array	cpp
0942.DI String Match	Easy (78.45%)	two-pointers	cpp
0943.Find the Shortest Superstring	Hard (43.79%)	string, dynamic-programming, bit-manipulation	cpp
0944.Delete Columns to Make Sorted	Easy (74.56%)	string, easy	cpp
0945.Minimum Increment to Make Array Unique	Medium (52.38%)	sort, greedy	cpp
0946.Validate Stack Sequences	Medium (69.44%)	stack	cpp
0947.Most Stones Removed with Same Row or Column	Medium (58.83%)	union-find	cpp
0948.Bag of Tokens	Medium (58.92%)	greedy	cpp
0949.Largest Time for Given Digits	Medium (35.13%)	easy	cpp
0950.Reveal Cards In Increasing Order	Medium (82.86%)	sort, array, queue	cpp
0951.Flip Equivalent Binary Trees	Medium (66.92%)	binary-tree, depth-first-search	cpp
0952.Largest Component Size by Common Factor	Hard (40.53%)	union-find, graph, math	cpp
0953.Verifying an Alien Dictionary	Easy (54.92%)	string, hash-table	cpp
0954.Array of Doubled Pairs	Medium (39.13%)	sort, hash-table, ordered-map	cpp
0955.Delete Columns to Make Sorted II	Medium (35.13%)	greedy, string	cpp
0956.Tallest Billboard	Hard (52.35%)	dynamic-programming	cpp
0957.Prison Cells After N Days	Medium (38.94%)	hash-table	cpp
0958.Check Completeness of a Binary Tree	Medium (56.78%)	binary-tree, breadth-first-search	cpp
0959.Regions Cut By Slashes	Medium (69.33%)	depth-first-search	cpp
0960.Delete Columns to Make Sorted III	Hard (57.82%)	dynamic-programming, string	cpp
0961.N-Repeated Element in Size 2N Array	Easy (76.60%)	hash-table, math	cpp
0962.Maximum Width Ramp	Medium (49.83%)	array, stack, monotonic-stack	cpp
0963.Minimum Area Rectangle II	Medium (54.71%)	math, geometry, hash-table	cpp
0964.Least Operators to Express Number	Hard (48.36%)	hard, digit, arithmetic	cpp
0965.Univalued Binary Tree	Easy (70.73%)	binary-tree, depth-first-search	cpp
0966.Vowel Spellchecker	Medium (51.37%)	hash-table, string	cpp
0967.Numbers With Same Consecutive Differences	Medium (57.97%)	recursion, math	cpp
0968.Binary Tree Cameras	Hard (46.59%)	binary-tree, depth-first-search	cpp
0969.Pancake Sorting	Medium (70.60%)	array, sort, greedy	cpp
0970.Powerful Integers	Medium (43.75%)	math, hash-table	cpp
0971.Flip Binary Tree To Match Preorder Traversal	Medium (50.46%)	binary-tree, depth-first-search	cpp
0972.Equal Rational Numbers	Hard (43.77%)	math, string	cpp
0973.K Closest Points to Origin	Medium (66.27%)	sort, heap	cpp
0974.Subarray Sums Divisible by K	Medium (53.99%)	hash-table, prefix-sum, math	cpp
0975.Odd Even Jump	Hard (39.75%)	ordered-map, depth-first-search, memoization, array	cpp
0976.Largest Perimeter Triangle	Easy (55.89%)	array, sort, greedy	cpp
0977.Squares of a Sorted Array	Easy (72.82%)	array, two-pointers	cpp
0978.Longest Turbulent Subarray	Medium (47.32%)	array, dynamic-programming	cpp
0979.Distribute Coins in Binary Tree	Medium (72.57%)	binary-tree, depth-first-search	cpp
0980.Unique Paths III	Hard (81.71%)	depth-first-search	cpp
0981.Time Based Key-Value Store	Medium (49.47%)	hash-table, binary-search, design, ordered-map	cpp
0982.Triples with Bitwise AND Equal To Zero	Hard (58.03%)	array, hash-table	cpp
0983.Minimum Cost For Tickets	Medium (65.28%)	dynamic-programming	cpp
0984.String Without AAA or BBB	Medium (43.82%)	greedy, string, recursion	cpp
0985.Sum of Even Numbers After Queries	Medium (68.06%)	array	cpp
0986.Interval List Intersections	Medium (71.56%)	two-pointers, interval	cpp
0987.Vertical Order Traversal of a Binary Tree	Hard (47.36%)	depth-first-search, sort, binary-tree	cpp
0988.Smallest String Starting From Leaf	Medium (51.17%)	binary-tree, depth-first-search	cpp
0989.Add to Array-Form of Integer	Easy (45.44%)	array, arithmetic	cpp
0990.Satisfiability of Equality Equations	Medium (50.45%)	depth-first-search, union-find, graph, math	cpp
0991.Broken Calculator	Medium (54.36%)	math, greedy, recursion	cpp
0992.Subarrays with K Different Integers	Hard (62.96%)	sliding-window, array, hash-table	cpp
0993.Cousins in Binary Tree	Easy (55.89%)	binary-tree, breadth-first-search, depth-first-search	cpp
0994.Rotting Oranges	Medium (53.97%)	matrix, breadth-first-search	cpp
0995.Minimum Number of K Consecutive Bit Flips	Hard (51.53%)	greedy, array, difference-array, bit-manipulation	cpp
0996.Number of Squareful Arrays	Hard (50.07%)	array, permutation, recursion, sort, hash-table	cpp
0997.Find the Town Judge	Easy (49.79%)	graph	cpp
0998.Maximum Binary Tree II	Medium (68.94%)	binary-tree, recursion	cpp
0999.Available Captures for Rook	Easy (68.85%)	depth-first-search, matrix	cpp
1000.Minimum Cost to Merge Stones	Hard (42.99%)	prefix-sum, dynamic-programming, hard	cpp
1001.Grid Illumination	Hard (36.64%)	hash-table, matrix	cpp
1002.Find Common Characters	Easy (68.86%)	array, string, hash-table	cpp
1003.Check If Word Is Valid After Substitutions	Medium (59.41%)	stack, string	cpp
1004.Max Consecutive Ones III	Medium (62.85%)	sliding-window	cpp
1005.Maximize Sum Of Array After K Negations	Easy (51.03%)	array, greedy, sort	cpp
1006.Clumsy Factorial	Medium (56.89%)	stack, math	cpp
1007.Minimum Domino Rotations For Equal Row	Medium (52.20%)	array, greedy	cpp
1008.Construct Binary Search Tree from Preorder Traversal	Medium (81.88%)	binary-tree, binary-search-tree, depth-first-search	cpp
1009.Complement of Base 10 Integer	Easy (60.78%)	bit-manipulation	cpp
1010.Pairs of Songs With Total Durations Divisible by 60	Medium (52.86%)	array, hash-table	cpp
1011.Capacity To Ship Packages Within D Days	Medium (69.29%)	array, binary-search	cpp
1012.Numbers With Repeated Digits	Hard (42.01%)	math, hash-table, digit	cpp
1013.Partition Array Into Three Parts With Equal Sum	Easy (41.98%)	array, prefix-sum	cpp
1014.Best Sightseeing Pair	Medium (59.23%)	array	cpp
1015.Smallest Integer Divisible by K	Medium (46.65%)	math	cpp
1016.Binary String With Substrings Representing 1 To N	Medium (57.37%)	bit-manipulation, math, string	cpp
1017.Convert to Base -2	Medium (60.58%)	math	cpp
1018.Binary Prefix Divisible By 5	Easy (46.72%)	math	cpp
1019.Next Greater Node In Linked List	Medium (60.67%)	linked-list, stack, monotonic-stack	cpp
1020.Number of Enclaves	Medium (68.72%)	depth-first-search, breadth-first-search, union-find, matrix, graph	cpp
1021.Remove Outermost Parentheses	Easy (82.41%)	parentheses, stack, string	cpp
1022.Sum of Root To Leaf Binary Numbers	Easy (73.07%)	binary-tree, depth-first-search	cpp
1023.Camelcase Matching	Medium (62.12%)	string	cpp
1024.Video Stitching	Medium (51.33%)	dynamic-programming, greedy, interval	cpp
1025.Divisor Game	Easy (68.61%)	math, game-theory	cpp
1026.Maximum Difference Between Node and Ancestor	Medium (78.14%)	binary-tree, depth-first-search	cpp
1027.Longest Arithmetic Subsequence	Medium (49.03%)	dynamic-programming	cpp
1028.Recover a Tree From Preorder Traversal	Hard (74.19%)	binary-tree, depth-first-search, string	cpp
1029.Two City Scheduling	Medium (66.63%)	greedy	cpp
1030.Matrix Cells in Distance Order	Easy (70.94%)	breadth-first-search, sort	cpp
1031.Maximum Sum of Two Non-Overlapping Subarrays	Medium (59.74%)	array, prefix-sum	cpp
1032.Stream of Characters	Hard (51.91%)	trie, design	cpp
1033.Moving Stones Until Consecutive	Medium (47.80%)	greedy, math	cpp
1034.Coloring A Border	Medium (48.89%)	depth-first-search, matrix	cpp
1035.Uncrossed Lines	Medium (62.92%)	dynamic-programming	cpp
1036.Escape a Large Maze	Hard (34.86%)	hash-table, math, matrix, breadth-first-search	cpp
1037.Valid Boomerang	Easy (36.95%)	math, geometry	cpp
1038.Binary Search Tree to Greater Sum Tree	Medium (85.79%)	binary-search-tree, binary-tree	cpp
1039.Minimum Score Triangulation of Polygon	Medium (58.71%)	dynamic-programming, memoization, depth-first-search, geometry, math	cpp
1040.Moving Stones Until Consecutive II	Medium (56.76%)	greedy, two-pointers	cpp
1041.Robot Bounded In Circle	Medium (55.63%)	array	cpp
1042.Flower Planting With No Adjacent	Medium (51.18%)	graph, greedy	cpp
1043.Partition Array for Maximum Sum	Medium (76.44%)	dynamic-programming	cpp
1044.Longest Duplicate Substring	Hard (30.53%)	string, hash-table, binary-search	cpp
1046.Last Stone Weight	Easy (65.31%)	heap	cpp
1047.Remove All Adjacent Duplicates In String	Easy (69.42%)	stack, string	cpp
1048.Longest String Chain	Medium (61.00%)	hash-table, sort	cpp
1049.Last Stone Weight II	Medium (55.20%)	dynamic-programming	cpp
1051.Height Checker	Easy (76.46%)	sort, counting-sort, array	cpp
1052.Grumpy Bookstore Owner	Medium (57.08%)	prefix-sum	cpp
1053.Previous Permutation With One Swap	Medium (49.71%)	math, permutation, greedy	cpp
1054.Distant Barcodes	Medium (46.46%)	hash-table, sort	cpp
1055.Shortest Way to Form String 🔒	Medium (60.09%)	string, two-pointers	cpp
1056.Confusing Number 🔒	Easy (48.66%)	math	cpp
1057.Campus Bikes 🔒	Medium (58.58%)	sort, geometry	cpp
1058.Minimize Rounding Error to Meet Target 🔒	Medium (45.01%)	math	cpp
1059.All Paths from Source Lead to Destination 🔒	Medium (37.67%)	graph, depth-first-search, memoization	cpp
1060.Missing Element in Sorted Array 🔒	Medium (56.60%)	array, binary-search	cpp
1061.Lexicographically Smallest Equivalent String	Medium (76.49%)	union-find, string	cpp
1062.Longest Repeating Substring 🔒	Medium (60.52%)	dynamic-programming, string	cpp
1063.Number of Valid Subarrays 🔒	Hard (78.41%)	array, monotonic-stack	cpp
1064.Fixed Point 🔒	Easy (64.14%)	array, binary-search	cpp
1065.Index Pairs of a String 🔒	Easy (67.25%)	string, trie	cpp
1066.Campus Bikes II 🔒	Medium (55.17%)	dynamic-programming, geometry, math	cpp
1067.Digit Count in Range 🔒	Hard (46.44%)	math	cpp
1071.Greatest Common Divisor of Strings	Easy (51.43%)	string	cpp
1072.Flip Columns For Maximum Number of Equal Rows	Medium (63.82%)	matrix, hash-table	cpp
1073.Adding Two Negabinary Numbers	Medium (36.75%)	arithmetic	cpp
1074.Number of Submatrices That Sum to Target	Hard (74.42%)	hash-table, prefix-sum, matrix	cpp
1078.Occurrences After Bigram	Easy (63.42%)	string	cpp
1079.Letter Tile Possibilities	Medium (76.15%)	hash-table, recursion, permutation, string	cpp
1080.Insufficient Nodes in Root to Leaf Paths	Medium (55.30%)	binary-tree, depth-first-search	cpp
1086.High Five 🔒	Easy (74.55%)	array, sort	cpp
1091.Shortest Path in Binary Matrix	Medium (47.21%)	breadth-first-search, matrix	cpp
1140.Stone Game II	Medium (67.91%)	depth-first-search, memoization, minimax, game-theory, prefix-sum	cpp
1143.Longest Common Subsequence	Medium (57.78%)	dynamic-programming, string	cpp
1201.Ugly Number III	Medium (29.35%)	binary-search, math	cpp
1209.Remove All Adjacent Duplicates in String II	Medium (57.62%)	stack, string	cpp
1217.Minimum Cost to Move Chips to The Same Position	Easy (71.70%)	math	cpp
1268.Search Suggestions System	Medium (65.21%)	sort, trie, design	cpp
1276.Number of Burgers with No Waste of Ingredients	Medium (51.06%)	math	cpp
1277.Count Square Submatrices with All Ones	Medium (75.03%)	dynamic-programming, matrix	cpp
1283.Find the Smallest Divisor Given a Threshold	Medium (59.38%)	binary-search, array	cpp
1290.Convert Binary Number in a Linked List to Integer	Easy (81.14%)	linked-list, easy	cpp
1312.Minimum Insertion Steps to Make a String Palindrome	Hard (70.36%)	string, dynamic-programming, depth-first-search, memoization, palindrome	cpp
1332.Remove Palindromic Subsequences	Easy (76.34%)	string, palindrome, greedy	cpp
1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance	Medium (59.78%)	graph, dijkstra, shortest-path	cpp
1340.Jump Game V	Hard (63.14%)	depth-first-search, memoization, array	cpp
1345.Jump Game IV	Hard (46.26%)	hash-table, breadth-first-search, array	cpp
1376.Time Needed to Inform All Employees	Medium (60.01%)	graph, tree, depth-first-search	cpp
1411.Number of Ways to Paint N × 3 Grid	Hard (63.43%)	math	cpp
1423.Maximum Points You Can Obtain from Cards	Medium (52.47%)	sliding-window, array	cpp
1429.First Unique Number 🔒	Medium (53.60%)	queue, hash-table, design	cpp
1438.Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Medium (49.24%)	sliding-window, ordered-map	cpp
1446.Consecutive Characters	Easy (60.40%)	string, easy	cpp
1472.Design Browser History	Medium (77.50%)	stack, design	cpp
1510. Stone Game IV	Hard (59.74%)	dynamic-programming, game-theory	cpp
1600.Throne Inheritance	Medium (64.91%)	tree	cpp
1658.Minimum Operations to Reduce X to Zero	Medium (39.67%)	array, hash-table, prefix-sum	cpp
1706.Where Will the Ball Fall	Medium (71.76%)	dynamic-programming, depth-first-search, memoization	cpp
1971.Find if Path Exists in Graph	Easy (51.57%)	graph, depth-first-search, breadth-first-search, union-find	cpp
2296.Design a Text Editor	Hard (44.05%)	stack, string, design, linked-list	cpp
2401.Longest Nice Subarray	Medium (50.75%)	bit-manipulation, sliding-window	cpp
2423.Remove Letter To Equalize Frequency	Easy (17.25%)	hash-table, string	cpp
2462.Total Cost to Hire K Workers	Medium (43.19%)	heap, sort, greedy, two-pointers	cpp
2511.Maximum Enemy Forts That Can Be Captured	Easy (38.02%)	array, two-pointers	cpp

Reference