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DSA practice and LeetCode problem solutions.

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Name		Name	Last commit message	Last commit date
.github/workflows		.github/workflows
0002-add-two-numbers		0002-add-two-numbers
0003-longest-substring-without-repeating-characters		0003-longest-substring-without-repeating-characters
0004-median-of-two-sorted-arrays		0004-median-of-two-sorted-arrays
0005-longest-palindromic-substring		0005-longest-palindromic-substring
0008-string-to-integer-atoi		0008-string-to-integer-atoi
0013-roman-to-integer		0013-roman-to-integer
0014-longest-common-prefix		0014-longest-common-prefix
0017-letter-combinations-of-a-phone-number		0017-letter-combinations-of-a-phone-number
0019-remove-nth-node-from-end-of-list		0019-remove-nth-node-from-end-of-list
0020-valid-parentheses		0020-valid-parentheses
0021-merge-two-sorted-lists		0021-merge-two-sorted-lists
0022-generate-parentheses		0022-generate-parentheses
0025-reverse-nodes-in-k-group		0025-reverse-nodes-in-k-group
0029-divide-two-integers		0029-divide-two-integers
0037-sudoku-solver		0037-sudoku-solver
0039-combination-sum		0039-combination-sum
0040-combination-sum-ii		0040-combination-sum-ii
0042-trapping-rain-water		0042-trapping-rain-water
0044-wildcard-matching		0044-wildcard-matching
0045-jump-game-ii		0045-jump-game-ii
0050-powx-n		0050-powx-n
0051-n-queens		0051-n-queens
0055-jump-game		0055-jump-game
0057-insert-interval		0057-insert-interval
0061-rotate-list		0061-rotate-list
0062-unique-paths		0062-unique-paths
0063-unique-paths-ii		0063-unique-paths-ii
0064-minimum-path-sum		0064-minimum-path-sum
0066-plus-one		0066-plus-one
0069-sqrtx		0069-sqrtx
0070-climbing-stairs		0070-climbing-stairs
0072-edit-distance		0072-edit-distance
0074-search-a-2d-matrix		0074-search-a-2d-matrix
0076-minimum-window-substring		0076-minimum-window-substring
0078-subsets		0078-subsets
0079-word-search		0079-word-search
0084-largest-rectangle-in-histogram		0084-largest-rectangle-in-histogram
0085-maximal-rectangle		0085-maximal-rectangle
0090-subsets-ii		0090-subsets-ii
0094-binary-tree-inorder-traversal		0094-binary-tree-inorder-traversal
0100-same-tree		0100-same-tree
0101-symmetric-tree		0101-symmetric-tree
0102-binary-tree-level-order-traversal		0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal		0103-binary-tree-zigzag-level-order-traversal
0104-maximum-depth-of-binary-tree		0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree		0110-balanced-binary-tree
0115-distinct-subsequences		0115-distinct-subsequences
0120-triangle		0120-triangle
0121-best-time-to-buy-and-sell-stock		0121-best-time-to-buy-and-sell-stock
0122-best-time-to-buy-and-sell-stock-ii		0122-best-time-to-buy-and-sell-stock-ii
0123-best-time-to-buy-and-sell-stock-iii		0123-best-time-to-buy-and-sell-stock-iii
0124-binary-tree-maximum-path-sum		0124-binary-tree-maximum-path-sum
0135-candy		0135-candy
0138-copy-list-with-random-pointer		0138-copy-list-with-random-pointer
0141-linked-list-cycle		0141-linked-list-cycle
0142-linked-list-cycle-ii		0142-linked-list-cycle-ii
0144-binary-tree-preorder-traversal		0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal		0145-binary-tree-postorder-traversal
0148-sort-list		0148-sort-list
0151-reverse-words-in-a-string		0151-reverse-words-in-a-string
0155-min-stack		0155-min-stack
0160-intersection-of-two-linked-lists		0160-intersection-of-two-linked-lists
0162-find-peak-element		0162-find-peak-element
0175-combine-two-tables		0175-combine-two-tables
0181-employees-earning-more-than-their-managers		0181-employees-earning-more-than-their-managers
0182-duplicate-emails		0182-duplicate-emails
0183-customers-who-never-order		0183-customers-who-never-order
0184-department-highest-salary		0184-department-highest-salary
0188-best-time-to-buy-and-sell-stock-iv		0188-best-time-to-buy-and-sell-stock-iv
0196-delete-duplicate-emails		0196-delete-duplicate-emails
0197-rising-temperature		0197-rising-temperature
0198-house-robber		0198-house-robber
0199-binary-tree-right-side-view		0199-binary-tree-right-side-view
0204-count-primes		0204-count-primes
0205-isomorphic-strings		0205-isomorphic-strings
0206-reverse-linked-list		0206-reverse-linked-list
0213-house-robber-ii		0213-house-robber-ii
0216-combination-sum-iii		0216-combination-sum-iii
0225-implement-stack-using-queues		0225-implement-stack-using-queues
0231-power-of-two		0231-power-of-two
0232-implement-queue-using-stacks		0232-implement-queue-using-stacks
0234-palindrome-linked-list		0234-palindrome-linked-list
0236-lowest-common-ancestor-of-a-binary-tree		0236-lowest-common-ancestor-of-a-binary-tree
0237-delete-node-in-a-linked-list		0237-delete-node-in-a-linked-list
0239-sliding-window-maximum		0239-sliding-window-maximum
0240-search-a-2d-matrix-ii		0240-search-a-2d-matrix-ii
0242-valid-anagram		0242-valid-anagram
0282-expression-add-operators		0282-expression-add-operators
0309-best-time-to-buy-and-sell-stock-with-cooldown		0309-best-time-to-buy-and-sell-stock-with-cooldown
0322-coin-change		0322-coin-change
0328-odd-even-linked-list		0328-odd-even-linked-list
0392-is-subsequence		0392-is-subsequence
0402-remove-k-digits		0402-remove-k-digits
0410-split-array-largest-sum		0410-split-array-largest-sum
0416-partition-equal-subset-sum		0416-partition-equal-subset-sum
0424-longest-repeating-character-replacement		0424-longest-repeating-character-replacement
0448-find-all-numbers-disappeared-in-an-array		0448-find-all-numbers-disappeared-in-an-array
0451-sort-characters-by-frequency		0451-sort-characters-by-frequency
0455-assign-cookies		0455-assign-cookies

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Total Problems Solved: 150
Last Updated: 28 October 2026

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DSA practice and LeetCode problem solutions.

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