leetcode-solutions

LeetCode Topics

Array

0081-search-in-rotated-sorted-array-ii
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0594-longest-harmonious-subsequence
0940-fruit-into-baskets
0966-binary-subarrays-with-sum
1510-find-lucky-integer-in-an-array
1603-running-sum-of-1d-array
1813-maximum-erasure-value
2204-find-subsequence-of-length-k-with-the-largest-sum
2316-count-hills-and-valleys-in-an-array
2320-find-all-k-distant-indices-in-an-array
2497-maximum-matching-of-players-with-trainers
3643-zero-array-transformation-ii
3779-eat-pizzas

Two Pointers

0019-remove-nth-node-from-end-of-list
0061-rotate-list
0142-linked-list-cycle-ii
0148-sort-list
0908-middle-of-the-linked-list
2320-find-all-k-distant-indices-in-an-array
2497-maximum-matching-of-players-with-trainers

String

0017-letter-combinations-of-a-phone-number
0022-generate-parentheses
0043-multiply-strings
0205-isomorphic-strings
0242-valid-anagram
0812-rotate-string
1078-remove-outermost-parentheses
1250-longest-common-subsequence
3617-find-the-original-typed-string-i

Dynamic Programming

0022-generate-parentheses
0803-cheapest-flights-within-k-stops
1250-longest-common-subsequence

Stack

1078-remove-outermost-parentheses

Hash Table

0017-letter-combinations-of-a-phone-number
0142-linked-list-cycle-ii
0205-isomorphic-strings
0242-valid-anagram
0594-longest-harmonious-subsequence
0940-fruit-into-baskets
0966-binary-subarrays-with-sum
1510-find-lucky-integer-in-an-array
1813-maximum-erasure-value
2204-find-subsequence-of-length-k-with-the-largest-sum

String Matching

0812-rotate-string

Sorting

0148-sort-list
0242-valid-anagram
0594-longest-harmonious-subsequence
2204-find-subsequence-of-length-k-with-the-largest-sum
2497-maximum-matching-of-players-with-trainers
3779-eat-pizzas

Binary Search

0081-search-in-rotated-sorted-array-ii
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
3643-zero-array-transformation-ii

Heap (Priority Queue)

0803-cheapest-flights-within-k-stops
2204-find-subsequence-of-length-k-with-the-largest-sum

Sliding Window

0594-longest-harmonious-subsequence
0940-fruit-into-baskets
0966-binary-subarrays-with-sum
1813-maximum-erasure-value

Counting

0594-longest-harmonious-subsequence
1510-find-lucky-integer-in-an-array

Depth-First Search

0547-number-of-provinces
0803-cheapest-flights-within-k-stops

Breadth-First Search

0547-number-of-provinces
0803-cheapest-flights-within-k-stops

Union Find

0547-number-of-provinces

Graph

0547-number-of-provinces
0803-cheapest-flights-within-k-stops

Prefix Sum

0966-binary-subarrays-with-sum
1603-running-sum-of-1d-array
3643-zero-array-transformation-ii

Math

0043-multiply-strings
1411-convert-binary-number-in-a-linked-list-to-integer
2050-count-good-numbers
3600-find-the-k-th-character-in-string-game-i

Bit Manipulation

3600-find-the-k-th-character-in-string-game-i

Recursion

2050-count-good-numbers
3600-find-the-k-th-character-in-string-game-i

Simulation

0043-multiply-strings
3600-find-the-k-th-character-in-string-game-i

Linked List

0019-remove-nth-node-from-end-of-list
0061-rotate-list
0142-linked-list-cycle-ii
0148-sort-list
0328-odd-even-linked-list
0908-middle-of-the-linked-list
1411-convert-binary-number-in-a-linked-list-to-integer

Greedy

2497-maximum-matching-of-players-with-trainers
3779-eat-pizzas

Shortest Path

0803-cheapest-flights-within-k-stops

Divide and Conquer

0148-sort-list

Merge Sort

0148-sort-list

Backtracking

0017-letter-combinations-of-a-phone-number
0022-generate-parentheses