Contains Duplicate

LC 217 · 271 modes

Palindrome Number

LC 9 · 40 modes

Roman to Integer

LC 13 · 40 modes

Longest Common Prefix

LC 14 · 40 modes

Remove Duplicates from Sorted Array

LC 26 · 37 modes

Search Insert Position

LC 35 · 37 modes

Add Binary

LC 67 · 33 modes

Merge Sorted Array

LC 88 · 39 modes

Pascal's Triangle

LC 118 · 37 modes

Excel Sheet Column Title

LC 168 · 24 modes

Majority Element

LC 169 · 38 modes

Isomorphic Strings

LC 205 · 38 modes

Contains Duplicate II

LC 219 · 35 modes

Palindrome Linked List

LC 234 · 30 modes

First Bad Version

LC 278 · 16 modes

Move Zeroes

LC 283 · 41 modes

Reverse String

LC 344 · 37 modes

First Unique Character in a String

LC 387 · 23 modes

Find the Difference

LC 389 · 20 modes

Fizz Buzz

LC 412 · 22 modes

Add Strings

LC 415 · 23 modes

Find All Numbers Disappeared in an Array

LC 448 · 39 modes

Design HashMap

LC 706 · 33 modes

To Lower Case

LC 709 · 22 modes

Jewels and Stones

LC 771 · 22 modes

Smallest Range I

LC 908 · 15 modes

Unique Email Addresses

LC 929 · 41 modes

Squares of a Sorted Array

LC 977 · 41 modes

Find Common Characters

LC 1002 · 23 modes

Height Checker

LC 1051 · 23 modes

Defanging an IP Address

LC 1108 · 18 modes

How Many Numbers Are Smaller Than the Current Number

LC 1365 · 23 modes

Shuffle the Array

LC 1470 · 31 modes

Two Sum

LC 1 · 270 modes

Zigzag Conversion

LC 6 · 32 modes

String to Integer (atoi)

LC 8 · 23 modes

3Sum Closest

LC 16 · 23 modes

4Sum

LC 18 · 38 modes

Next Permutation

LC 31 · 22 modes

Count and Say

LC 38 · 23 modes

Permutations II

LC 47 · 30 modes

Pow(x, n)

LC 50 · 33 modes

Spiral Matrix II

LC 59 · 21 modes

Simplify Path

LC 71 · 36 modes

Combinations

LC 77 · 32 modes

Search in Rotated Sorted Array II

LC 81 · 24 modes

Restore IP Addresses

LC 93 · 34 modes

Best Time to Buy and Sell Stock II

LC 122 · 35 modes

Single Number II

LC 137 · 24 modes

Longest Substring with At Most Two Distinct Characters

LC 159 · 22 modes

Count Primes

LC 204 · 23 modes

Majority Element II

LC 229 · 20 modes

Search a 2D Matrix II

LC 240 · 23 modes

H-Index

LC 274 · 25 modes

Perfect Squares

LC 279 · 28 modes

Remove Duplicate Letters

LC 316 · 19 modes

Integer Break

LC 343 · 25 modes

Largest Divisible Subset

LC 368 · 23 modes

Kth Smallest Element in a Sorted Matrix

LC 378 · 22 modes

Insert Delete GetRandom O(1)

LC 380 · 35 modes

Longest Substring with At Least K Repeating Characters

LC 395 · 23 modes

Evaluate Division

LC 399 · 26 modes

Remove K Digits

LC 402 · 34 modes

Contiguous Array

LC 525 · 22 modes

Encode and Decode TinyURL

LC 535 · 37 modes

Brick Wall

LC 554 · 36 modes

Subarray Sum Equals K

LC 560 · 41 modes

Non-decreasing Array

LC 665 · 33 modes

Next Closest Time

LC 681 · 19 modes

Repeated String Match

LC 686 · 22 modes

Top K Frequent Words

LC 692 · 22 modes

Split Linked List in Parts

LC 725 · 23 modes

Number of Subarrays with Bounded Maximum

LC 795 · 20 modes

Score of Parentheses

LC 856 · 19 modes

Stone Game

LC 877 · 24 modes

Smallest Range II

LC 910 · 19 modes

Pairs of Songs With Total Durations Divisible by 60

LC 1010 · 23 modes

Reverse Substrings Between Each Pair of Parentheses

LC 1190 · 23 modes

Group Anagrams

LC 49 · 262 modes

Product of Array Except Self

LC 238 · 255 modes

Valid Sudoku

LC 36 · 256 modes

Longest Consecutive Sequence

LC 128 · 265 modes

Substring with Concatenation of All Words

LC 30 · 23 modes

Longest Valid Parentheses

LC 32 · 23 modes

Sudoku Solver

LC 37 · 23 modes

First Missing Positive

LC 41 · 37 modes

Wildcard Matching

LC 44 · 22 modes

Valid Number

LC 65 · 15 modes

Find Minimum in Rotated Sorted Array II

LC 154 · 21 modes

Shortest Palindrome

LC 214 · 23 modes

The Skyline Problem

LC 218 · 23 modes

Contains Duplicate III

LC 220 · 23 modes

Basic Calculator

LC 224 · 23 modes

Count of Smaller Numbers After Self

LC 315 · 22 modes

Strong Password Checker

LC 420 · 23 modes

Arithmetic Slices II - Subsequence

LC 446 · 23 modes

LFU Cache

LC 460 · 24 modes

Number of Atoms

LC 726 · 23 modes

Brace Expansion II

LC 1096 · 22 modes

Critical Connections in a Network

LC 1192 · 21 modes

Valid Palindrome

LC 125 · 264 modes

Self Dividing Numbers

LC 728 · 23 modes

Integer to Roman

LC 12 · 35 modes

Bitwise AND of Numbers Range

LC 201 · 21 modes

3Sum

LC 15 · 264 modes

Container With Most Water

LC 11 · 257 modes

Trapping Rain Water

LC 42 · 263 modes

Best Time to Buy And Sell Stock

LC 121 · 262 modes

Longest Substring Without Repeating Characters

LC 3 · 257 modes

Longest Repeating Character Replacement

LC 424 · 257 modes

Minimum Window Substring

LC 76 · 256 modes

Sliding Window Maximum

LC 239 · 256 modes

Valid Parentheses

LC 20 · 267 modes

Min Stack

LC 155 · 252 modes

Daily Temperatures

LC 739 · 252 modes

Largest Rectangle In Histogram

LC 84 · 254 modes

Binary Search

LC 704 · 269 modes

Search a 2D Matrix

LC 74 · 255 modes

Koko Eating Bananas

LC 875 · 256 modes

Find Minimum In Rotated Sorted Array

LC 153 · 257 modes

Search In Rotated Sorted Array

LC 33 · 256 modes

Median of Two Sorted Arrays

LC 4 · 257 modes

Reverse Linked List

LC 206 · 260 modes

Merge Two Sorted Lists

LC 21 · 251 modes

Linked List Cycle

LC 141 · 247 modes

Reorder List

LC 143 · 244 modes

Remove Nth Node From End of List

LC 19 · 256 modes

Copy List With Random Pointer

LC 138 · 246 modes

Add Two Numbers

LC 2 · 255 modes

Find The Duplicate Number

LC 287 · 252 modes

LRU Cache

LC 146 · 250 modes

Merge K Sorted Lists

LC 23 · 254 modes

Reverse Nodes In K Group

LC 25 · 254 modes

Remove Duplicates from Sorted List

LC 83 · 34 modes

Symmetric Tree

LC 101 · 26 modes

Path Sum

LC 112 · 34 modes

Binary Tree Postorder Traversal

LC 145 · 28 modes

Remove Linked List Elements

LC 203 · 38 modes

Binary Tree Paths

LC 257 · 18 modes

Sum of Left Leaves

LC 404 · 19 modes

Merge Two Binary Trees

LC 617 · 34 modes

Search in a Binary Search Tree

LC 700 · 25 modes

Middle of the Linked List

LC 876 · 32 modes

Cousins in Binary Tree

LC 993 · 23 modes

Maximum Depth of Binary Tree

LC 104 · 258 modes

Diameter of Binary Tree

LC 543 · 258 modes

Balanced Binary Tree

LC 110 · 258 modes

Swap Nodes in Pairs

LC 24 · 29 modes

Rotate List

LC 61 · 28 modes

Remove Duplicates from Sorted List II

LC 82 · 22 modes

Reverse Linked List II

LC 92 · 32 modes

Unique Binary Search Trees II

LC 95 · 21 modes

Unique Binary Search Trees

LC 96 · 22 modes

Binary Tree Level Order Traversal II

LC 107 · 21 modes

Path Sum II

LC 113 · 20 modes

Flatten Binary Tree to Linked List

LC 114 · 19 modes

Linked List Cycle II

LC 142 · 19 modes

Sort List

LC 148 · 27 modes

Lowest Common Ancestor of a Binary Tree

LC 236 · 20 modes

Delete Node in a Linked List

LC 237 · 14 modes

Binary Tree Vertical Order Traversal

LC 314 · 18 modes

Boundary of Binary Tree

LC 545 · 17 modes

Trim a Binary Search Tree

LC 669 · 31 modes

Lowest Common Ancestor of a Binary Search Tree

LC 235 · 254 modes

Binary Tree Level Order Traversal

LC 102 · 259 modes

Binary Tree Right Side View

LC 199 · 259 modes

Validate Binary Search Tree

LC 98 · 258 modes

Construct Binary Tree From Preorder And Inorder Traversal

LC 105 · 255 modes

Vertical Order Traversal of a Binary Tree

LC 987 · 22 modes

Binary Tree Maximum Path Sum

LC 124 · 257 modes

Kth Largest Element In a Stream

LC 703 · 245 modes

Nim Game

LC 292 · 18 modes

Kth Largest Element In An Array

LC 215 · 249 modes

Find Median From Data Stream

LC 295 · 248 modes

Add Digits

LC 258 · 15 modes

Subsets

LC 78 · 256 modes

Combination Sum

LC 39 · 255 modes

Combination Sum II

LC 40 · 253 modes

Permutations

LC 46 · 255 modes

Subsets II

LC 90 · 256 modes

Generate Parentheses

LC 22 · 254 modes

Word Search

LC 79 · 252 modes

Palindrome Partitioning

LC 131 · 255 modes

N Queens

LC 51 · 255 modes

Rectangle Overlap

LC 836 · 23 modes

Number of Islands

LC 200 · 261 modes

Lexicographical Numbers

LC 386 · 22 modes

Max Area of Island

LC 695 · 256 modes

Rotting Oranges

LC 994 · 251 modes

Climbing Stairs

LC 70 · 262 modes

Min Cost Climbing Stairs

LC 746 · 256 modes

House Robber

LC 198 · 257 modes

Longest Palindromic Substring

LC 5 · 258 modes

Palindromic Substrings

LC 647 · 255 modes

Decode Ways

LC 91 · 253 modes

Coin Change

LC 322 · 262 modes

Maximum Product Subarray

LC 152 · 253 modes

Word Break

LC 139 · 254 modes

Longest Increasing Subsequence

LC 300 · 263 modes

Unique Paths

LC 62 · 255 modes

Target Sum

LC 494 · 253 modes

Edit Distance

LC 72 · 244 modes

Longest Increasing Path In a Matrix

LC 329 · 250 modes

Distinct Subsequences

LC 115 · 249 modes

Burst Balloons

LC 312 · 249 modes

Regular Expression Matching

LC 10 · 254 modes

Maximum Subarray

LC 53 · 260 modes

Minimum Path Sum

LC 64 · 29 modes

Guess Number Higher or Lower II

LC 375 · 22 modes

Jump Game

LC 55 · 253 modes

Jump Game II

LC 45 · 249 modes

Gas Station

LC 134 · 251 modes

Cherry Pickup

LC 741 · 23 modes

Insert Interval

LC 57 · 254 modes

Merge Intervals

LC 56 · 261 modes

Happy Number

LC 202 · 252 modes

Plus One

LC 66 · 251 modes

Rotate Image

LC 48 · 252 modes

Maximal Square

LC 221 · 30 modes

Spiral Matrix

LC 54 · 250 modes

Set Matrix Zeroes

LC 73 · 249 modes

Pow(x, n)

246 modes

Multiply Strings

LC 43 · 246 modes

Maximal Rectangle

LC 85 · 23 modes

Preimage Size of Factorial Zeroes Function

LC 793 · 23 modes

Single Number

LC 136 · 249 modes

Number of 1 Bits

LC 191 · 251 modes

Missing Number

LC 268 · 251 modes

Divide Two Integers

LC 29 · 23 modes

Reverse Integer

LC 7 · 251 modes