🧮 LeetCode Solutions

My personal archive of LeetCode problems solved in Java. Each file includes the problem link, approach, and clean code implementation.

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LeetCode Topics

Array

Problem Name	Difficulty
0027-remove-element	Easy
0031-next-permutation	Medium
0287-find-the-duplicate-number	Medium
1357-apply-discount-every-n-orders	Medium
1701-average-waiting-time	Medium
1800-maximum-ascending-subarray-sum	Easy
1953-maximum-number-of-weeks-for-which-you-can-work	Medium
2043-simple-bank-system	Medium
2195-append-k-integers-with-minimal-sum	Medium
2512-reward-top-k-students	Medium
2744-find-maximum-number-of-string-pairs	Easy
3397-maximum-number-of-distinct-elements-after-operations	Medium
3522-calculate-score-after-performing-instructions	Medium

Two Pointers

Problem Name	Difficulty
0027-remove-element	Easy
0031-next-permutation	Medium
0287-find-the-duplicate-number	Medium

Hash Table

Problem Name	Difficulty
1357-apply-discount-every-n-orders	Medium
2043-simple-bank-system	Medium
2512-reward-top-k-students	Medium
2744-find-maximum-number-of-string-pairs	Easy
3522-calculate-score-after-performing-instructions	Medium

Design

Problem Name	Difficulty
1357-apply-discount-every-n-orders	Medium
2043-simple-bank-system	Medium

Simulation

Problem Name	Difficulty
1701-average-waiting-time	Medium
2043-simple-bank-system	Medium
2744-find-maximum-number-of-string-pairs	Easy
3522-calculate-score-after-performing-instructions	Medium

Binary Search

Problem Name	Difficulty
0287-find-the-duplicate-number	Medium

Bit Manipulation

Problem Name	Difficulty
0287-find-the-duplicate-number	Medium

String

Problem Name	Difficulty
2512-reward-top-k-students	Medium
2744-find-maximum-number-of-string-pairs	Easy
3522-calculate-score-after-performing-instructions	Medium

Sorting

Problem Name	Difficulty
2195-append-k-integers-with-minimal-sum	Medium
2512-reward-top-k-students	Medium
3397-maximum-number-of-distinct-elements-after-operations	Medium

Heap (Priority Queue)

Problem Name	Difficulty
2512-reward-top-k-students	Medium

Math

Problem Name	Difficulty
2195-append-k-integers-with-minimal-sum	Medium

Greedy

Problem Name	Difficulty
1953-maximum-number-of-weeks-for-which-you-can-work	Medium
2195-append-k-integers-with-minimal-sum	Medium
3397-maximum-number-of-distinct-elements-after-operations	Medium