Keyboard Row

LC 500 · 11 modes

Degree of an Array

LC 697 · 16 modes

Two Sum

LC 1 · 263 modes

Group Anagrams

LC 49 · 255 modes

3Sum Smaller

LC 259 · 16 modes

3Sum

LC 15 · 257 modes

Last Substring in Lexicographical Order

LC 1163 · 14 modes

Valid Parentheses

LC 20 · 260 modes

Implement Stack using Queues

LC 225 · 30 modes

Implement Queue using Stacks

LC 232 · 11 modes

Verify Preorder Sequence in Binary Search Tree

LC 255 · 12 modes

Reverse Linked List

LC 206 · 253 modes

Add Two Numbers

LC 2 · 248 modes

Reverse Nodes In K Group

LC 25 · 247 modes

Sum of Left Leaves

LC 404 · 12 modes

Construct Binary Tree from Inorder and Postorder Traversal

LC 106 · 16 modes

Binary Tree Vertical Order Traversal

LC 314 · 11 modes

Binary Tree Level Order Traversal

LC 102 · 252 modes

Binary Tree Right Side View

LC 199 · 252 modes

Validate Binary Search Tree

LC 98 · 251 modes

Merge K Sorted Lists

LC 23 · 247 modes

Beautiful Arrangement

LC 526 · 14 modes

Number of Islands

LC 200 · 254 modes

Number of Operations to Make Network Connected

LC 1319 · 12 modes

Max Area of Island

LC 695 · 249 modes

Clone Graph

LC 133 · 244 modes

Shortest Distance from All Buildings

LC 317 · 8 modes

Fibonacci Number

LC 509 · 16 modes

Minimum Cost Tree From Leaf Values

LC 1130 · 13 modes

Longest Palindromic Substring

LC 5 · 251 modes

Palindromic Substrings

LC 647 · 248 modes

Coin Change

LC 322 · 255 modes

Unique Paths

LC 62 · 248 modes

Unique Paths II

LC 63 · 23 modes

Cherry Pickup

LC 741 · 16 modes

Distinct Subsequences

LC 115 · 242 modes

Reshape the Matrix

LC 566 · 15 modes

Rectangle Overlap

LC 836 · 12 modes

Bulb Switcher

LC 319 · 8 modes

Multiply Strings

LC 43 · 239 modes

Counting Bits

LC 338 · 244 modes