Leetcode Solutions

LeetCode Topics

Array

0322-coin-change
0759-set-intersection-size-at-least-two
0944-delete-columns-to-make-sorted
1340-jump-game-v
1351-count-negative-numbers-in-a-sorted-matrix
1390-four-divisors
1548-check-if-all-1s-are-at-least-length-k-places-away
1732-find-the-highest-altitude
2161-partition-array-according-to-given-pivot
2753-minimum-number-of-operations-to-make-all-array-elements-equal-to-1
3074-apple-redistribution-into-boxes
3531-count-covered-buildings
3532-path-existence-queries-in-a-graph-i
3559-number-of-ways-to-assign-edge-weights-ii
3581-the-two-sneaky-numbers-of-digitville
3606-coupon-code-validator
3652-best-time-to-buy-and-sell-stock-using-strategy
3689-maximum-total-subarray-value-i
3737-count-subarrays-with-majority-element-i
3838-weighted-word-mapping

Hash Table

3531-count-covered-buildings
3532-path-existence-queries-in-a-graph-i
3581-the-two-sneaky-numbers-of-digitville
3606-coupon-code-validator
3713-longest-balanced-substring-i
3714-longest-balanced-substring-ii
3737-count-subarrays-with-majority-element-i

Math

1390-four-divisors
1636-number-of-substrings-with-only-1s
2288-count-operations-to-obtain-zero
2753-minimum-number-of-operations-to-make-all-array-elements-equal-to-1
3558-number-of-ways-to-assign-edge-weights-i
3559-number-of-ways-to-assign-edge-weights-ii
3581-the-two-sneaky-numbers-of-digitville
3700-number-of-zigzag-arrays-ii

Dynamic Programming

0044-wildcard-matching
0322-coin-change
1340-jump-game-v
3559-number-of-ways-to-assign-edge-weights-ii
3699-number-of-zigzag-arrays-i
3700-number-of-zigzag-arrays-ii

Breadth-First Search

0322-coin-change
1161-maximum-level-sum-of-a-binary-tree
2092-find-all-people-with-secret

Simulation

2161-partition-array-according-to-given-pivot
2288-count-operations-to-obtain-zero
3612-process-string-with-special-operations-i
3838-weighted-word-mapping

Number Theory

2753-minimum-number-of-operations-to-make-all-array-elements-equal-to-1

String

0044-wildcard-matching
0944-delete-columns-to-make-sorted
1636-number-of-substrings-with-only-1s
2483-minimum-penalty-for-a-shop
2887-sort-vowels-in-a-string
3493-maximum-number-of-operations-to-move-ones-to-the-end
3606-coupon-code-validator
3612-process-string-with-special-operations-i
3713-longest-balanced-substring-i
3714-longest-balanced-substring-ii
3838-weighted-word-mapping

Greedy

0044-wildcard-matching
0759-set-intersection-size-at-least-two
3074-apple-redistribution-into-boxes
3493-maximum-number-of-operations-to-move-ones-to-the-end
3689-maximum-total-subarray-value-i

Counting

3493-maximum-number-of-operations-to-move-ones-to-the-end
3713-longest-balanced-substring-i
3737-count-subarrays-with-majority-element-i

Sorting

0759-set-intersection-size-at-least-two
1340-jump-game-v
2092-find-all-people-with-secret
2887-sort-vowels-in-a-string
3074-apple-redistribution-into-boxes
3531-count-covered-buildings
3606-coupon-code-validator

Sliding Window

3652-best-time-to-buy-and-sell-stock-using-strategy

Prefix Sum

1732-find-the-highest-altitude
2483-minimum-penalty-for-a-shop
3652-best-time-to-buy-and-sell-stock-using-strategy
3699-number-of-zigzag-arrays-i
3714-longest-balanced-substring-ii
3737-count-subarrays-with-majority-element-i

Depth-First Search

1161-maximum-level-sum-of-a-binary-tree
2092-find-all-people-with-secret
3558-number-of-ways-to-assign-edge-weights-i
3559-number-of-ways-to-assign-edge-weights-ii

Union Find

2092-find-all-people-with-secret

Graph

2092-find-all-people-with-secret

Recursion

0044-wildcard-matching

Binary Search

1351-count-negative-numbers-in-a-sorted-matrix
3532-path-existence-queries-in-a-graph-i

Matrix

1351-count-negative-numbers-in-a-sorted-matrix

Tree

1161-maximum-level-sum-of-a-binary-tree
3558-number-of-ways-to-assign-edge-weights-i
3559-number-of-ways-to-assign-edge-weights-ii

Binary Tree

1161-maximum-level-sum-of-a-binary-tree

Enumeration

3713-longest-balanced-substring-i

Two Pointers

2130-maximum-twin-sum-of-a-linked-list
2161-partition-array-according-to-given-pivot

Bit Manipulation

3559-number-of-ways-to-assign-edge-weights-ii

Linked List

2130-maximum-twin-sum-of-a-linked-list

Stack

2130-maximum-twin-sum-of-a-linked-list

Divide and Conquer

3737-count-subarrays-with-majority-element-i

Segment Tree

3737-count-subarrays-with-majority-element-i

Merge Sort

3737-count-subarrays-with-majority-element-i

Union-Find

3532-path-existence-queries-in-a-graph-i

Graph Theory

3532-path-existence-queries-in-a-graph-i