algorithm

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LeetCode Topics

Tree

0100-same-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree

Depth-First Search

0100-same-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0200-number-of-islands

Breadth-First Search

0100-same-tree
0104-maximum-depth-of-binary-tree
0200-number-of-islands
0322-coin-change

Binary Tree

0100-same-tree
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree

Array

0039-combination-sum
0046-permutations
0078-subsets
0198-house-robber
0200-number-of-islands
0322-coin-change
0746-min-cost-climbing-stairs

Union-Find

0200-number-of-islands

Matrix

0200-number-of-islands

Dynamic Programming

0070-climbing-stairs
0198-house-robber
0322-coin-change
0746-min-cost-climbing-stairs

Knapsack Problem

0322-coin-change

Complete Knapsack

0322-coin-change

Math

0070-climbing-stairs

Memoization

0070-climbing-stairs

Backtracking

0017-letter-combinations-of-a-phone-number
0039-combination-sum
0046-permutations
0077-combinations
0078-subsets
0784-letter-case-permutation

Bit Manipulation

0078-subsets
0191-number-of-1-bits
0784-letter-case-permutation

String

0017-letter-combinations-of-a-phone-number
0784-letter-case-permutation

Divide and Conquer

0191-number-of-1-bits

Hash Table

0017-letter-combinations-of-a-phone-number