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Companies
Citadel
Array
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0/64 solved
Trapping Rain Water
HARD
Best Time to Buy and Sell Stock
EASY
3Sum
MEDIUM
Container With Most Water
MEDIUM
Median of Two Sorted Arrays
HARD
Find the Duplicate Number
MEDIUM
Number of Islands
MEDIUM
Merge Intervals
MEDIUM
Subarray Sum Equals K
MEDIUM
House Robber
MEDIUM
Longest Increasing Subsequence
MEDIUM
Group Anagrams
MEDIUM
Permutations
MEDIUM
Combination Sum
MEDIUM
Sliding Window Maximum
HARD
Word Search
MEDIUM
Construct Binary Tree from Preorder and Inorder Traversal
MEDIUM
Best Time to Buy and Sell Stock II
MEDIUM
Rotting Oranges
MEDIUM
N-Queens
HARD
Search a 2D Matrix II
MEDIUM
Maximal Square
MEDIUM
Best Time to Buy and Sell Stock III
HARD
Sudoku Solver
HARD
Evaluate Division
MEDIUM
Insert Delete GetRandom O(1)
MEDIUM
Longest Increasing Path in a Matrix
HARD
Permutations II
MEDIUM
Asteroid Collision
MEDIUM
Evaluate Reverse Polish Notation
MEDIUM
Delete and Earn
MEDIUM
Best Time to Buy and Sell Stock IV
HARD
Longest String Chain
MEDIUM
Subarray Sums Divisible by K
MEDIUM
Best Time to Buy and Sell Stock with Transaction Fee
MEDIUM
Maximum Length of Repeated Subarray
MEDIUM
The Skyline Problem
HARD
Open the Lock
MEDIUM
Search Suggestions System
MEDIUM
Count Number of Nice Subarrays
MEDIUM
Alien Dictionary
HARD
Bus Routes
HARD
Transpose Matrix
EASY
Design Circular Queue
MEDIUM
Count Number of Teams
MEDIUM
Insert Delete GetRandom O(1) - Duplicates allowed
HARD
Paint House
MEDIUM
Employee Free Time
HARD
Moving Average from Data Stream
EASY
3Sum Smaller
MEDIUM
Parallel Courses III
HARD
Count Number of Maximum Bitwise-OR Subsets
MEDIUM
Length of Longest Subarray With at Most K Frequency
MEDIUM
Rank Transform of a Matrix
HARD
Design Front Middle Back Queue
MEDIUM
Longest Non-decreasing Subarray From Two Arrays
MEDIUM
First Completely Painted Row or Column
MEDIUM
Transform to Chessboard
HARD
Maximum Total Damage With Spell Casting
MEDIUM
Design Excel Sum Formula
HARD
Best Position for a Service Centre
HARD
Minimum Costs Using the Train Line
HARD
Minimum Equal Sum of Two Arrays After Replacing Zeros
MEDIUM
Minimum Operations to Make Numbers Non-positive
HARD