Insert Delete GetRandom O(1)

LC 380 · 21 modes

Find All Duplicates in an Array

LC 442 · 15 modes

Pairs of Songs With Total Durations Divisible by 60

LC 1010 · 16 modes

Top K Frequent Elements

LC 347 · 257 modes

First Missing Positive

LC 41 · 30 modes

Sort Colors

LC 75 · 35 modes

Shortest Palindrome

LC 214 · 16 modes

Longest Repeating Character Replacement

LC 424 · 250 modes

Basic Calculator III

LC 772 · 9 modes

Inorder Successor in BST

LC 285 · 9 modes

Find Leaves of Binary Tree

LC 366 · 13 modes

Top K Frequent Words

LC 692 · 15 modes

Kth Largest Element In An Array

LC 215 · 242 modes

Clone Graph

LC 133 · 244 modes

Alien Dictionary

LC 269 · 237 modes

Delete and Earn

LC 740 · 22 modes

Word Break

LC 139 · 247 modes

Non-negative Integers without Consecutive Ones

LC 600 · 12 modes

Regular Expression Matching

LC 10 · 247 modes