Two Sum

LC 1 · 263 modes

Subdomain Visit Count

LC 811 · 12 modes

Group the People Given the Group Size They Belong To

LC 1282 · 16 modes

Valid Sudoku

LC 36 · 249 modes

Last Substring in Lexicographical Order

LC 1163 · 14 modes

Count Number of Nice Subarrays

LC 1248 · 12 modes

Maximum Number of Occurrences of a Substring

LC 1297 · 10 modes

Sliding Window Maximum

LC 239 · 249 modes

Basic Calculator

LC 224 · 15 modes

Basic Calculator IV

LC 770 · 8 modes

Convert Binary Number in a Linked List to Integer

LC 1290 · 14 modes

LRU Cache

LC 146 · 243 modes

Letter Combinations of a Phone Number

LC 17 · 248 modes

Sudoku Solver

LC 37 · 10 modes

Word Search II

LC 212 · 240 modes

Number of Islands

LC 200 · 254 modes

Course Schedule II

LC 210 · 244 modes

Longest Palindromic Substring

LC 5 · 251 modes

Palindromic Substrings

LC 647 · 248 modes

Break a Palindrome

LC 1328 · 16 modes

Consecutive Numbers Sum

LC 829 · 16 modes