LeetCode-Solutions

LeetCode Topics

Array

0001-two-sum
0015-3sum
0026-remove-duplicates-from-sorted-array
0037-sudoku-solver
0041-first-missing-positive
0048-rotate-image
0051-n-queens
0080-remove-duplicates-from-sorted-array-ii
0084-largest-rectangle-in-histogram
0486-predict-the-winner
0496-next-greater-element-i
0877-stone-game
0905-sort-array-by-parity
0994-rotting-oranges
1406-stone-game-iii

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0012-integer-to-roman
0013-roman-to-integer
0037-sudoku-solver
0041-first-missing-positive
0142-linked-list-cycle-ii
0460-lfu-cache
0496-next-greater-element-i
0987-vertical-order-traversal-of-a-binary-tree

Linked List

0002-add-two-numbers
0021-merge-two-sorted-lists
0023-merge-k-sorted-lists
0024-swap-nodes-in-pairs
0025-reverse-nodes-in-k-group
0061-rotate-list
0142-linked-list-cycle-ii
0460-lfu-cache

Math

0002-add-two-numbers
0007-reverse-integer
0012-integer-to-roman
0013-roman-to-integer
0048-rotate-image
0486-predict-the-winner
0877-stone-game
1406-stone-game-iii
3014-minimum-number-of-pushes-to-type-word-i

Recursion

0002-add-two-numbers
0010-regular-expression-matching
0021-merge-two-sorted-lists
0024-swap-nodes-in-pairs
0025-reverse-nodes-in-k-group
0486-predict-the-winner

String

0003-longest-substring-without-repeating-characters
0005-longest-palindromic-substring
0008-string-to-integer-atoi
0010-regular-expression-matching
0012-integer-to-roman
0013-roman-to-integer
0020-valid-parentheses
0022-generate-parentheses
0032-longest-valid-parentheses
3014-minimum-number-of-pushes-to-type-word-i

Sliding Window

0003-longest-substring-without-repeating-characters

Two Pointers

0005-longest-palindromic-substring
0015-3sum
0026-remove-duplicates-from-sorted-array
0061-rotate-list
0080-remove-duplicates-from-sorted-array-ii
0142-linked-list-cycle-ii
0905-sort-array-by-parity

Dynamic Programming

0005-longest-palindromic-substring
0010-regular-expression-matching
0022-generate-parentheses
0032-longest-valid-parentheses
0486-predict-the-winner
0877-stone-game
1406-stone-game-iii

Sorting

0015-3sum
0905-sort-array-by-parity
0987-vertical-order-traversal-of-a-binary-tree

Tree

0101-symmetric-tree
0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0987-vertical-order-traversal-of-a-binary-tree

Depth-First Search

0101-symmetric-tree
0987-vertical-order-traversal-of-a-binary-tree

Breadth-First Search

0101-symmetric-tree
0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0987-vertical-order-traversal-of-a-binary-tree
0994-rotting-oranges

Binary Tree

0101-symmetric-tree
0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0987-vertical-order-traversal-of-a-binary-tree

Stack

0020-valid-parentheses
0032-longest-valid-parentheses
0084-largest-rectangle-in-histogram
0225-implement-stack-using-queues
0496-next-greater-element-i

Matrix

0037-sudoku-solver
0048-rotate-image
0994-rotting-oranges

Divide and Conquer

0023-merge-k-sorted-lists

Heap (Priority Queue)

0023-merge-k-sorted-lists

Merge Sort

0023-merge-k-sorted-lists

Backtracking

0022-generate-parentheses
0037-sudoku-solver
0051-n-queens

Monotonic Stack

0084-largest-rectangle-in-histogram
0496-next-greater-element-i

Design

0225-implement-stack-using-queues
0460-lfu-cache

Queue

0225-implement-stack-using-queues

Database

0182-duplicate-emails

Greedy

3014-minimum-number-of-pushes-to-type-word-i

Game Theory

0486-predict-the-winner
0877-stone-game
1406-stone-game-iii

Doubly-Linked List

0460-lfu-cache

Minimax

1406-stone-game-iii

Zero-Sum Game

1406-stone-game-iii