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Companies
Bloomberg
Hash Table
Hash Table
0/55 solved
Two Sum
EASY
Longest Substring Without Repeating Characters
MEDIUM
Subarray Sum Equals K
MEDIUM
LRU Cache
MEDIUM
Longest Consecutive Sequence
MEDIUM
Majority Element
EASY
Group Anagrams
MEDIUM
Letter Combinations of a Phone Number
MEDIUM
Minimum Window Substring
HARD
Top K Frequent Elements
MEDIUM
Word Break
MEDIUM
First Missing Positive
HARD
Construct Binary Tree from Preorder and Inorder Traversal
MEDIUM
Roman to Integer
EASY
Set Matrix Zeroes
MEDIUM
Copy List with Random Pointer
MEDIUM
Valid Anagram
EASY
Find All Anagrams in a String
MEDIUM
Word Ladder
HARD
Valid Sudoku
MEDIUM
Task Scheduler
MEDIUM
Find All Duplicates in an Array
MEDIUM
Partition Labels
MEDIUM
Sudoku Solver
HARD
Clone Graph
MEDIUM
Insert Delete GetRandom O(1)
MEDIUM
First Unique Character in a String
EASY
Sort Characters By Frequency
MEDIUM
Construct Binary Tree from Inorder and Postorder Traversal
MEDIUM
Vertical Order Traversal of a Binary Tree
HARD
Top K Frequent Words
MEDIUM
Integer to Roman
MEDIUM
Word Break II
HARD
Intersection of Two Arrays
EASY
Word Ladder II
HARD
LFU Cache
HARD
How Many Numbers Are Smaller Than the Current Number
EASY
Number of Good Pairs
EASY
Open the Lock
MEDIUM
Maximum Frequency Stack
HARD
Design Underground System
MEDIUM
Binary Tree Vertical Order Traversal
MEDIUM
Degree of an Array
EASY
Construct Binary Tree from Preorder and Postorder Traversal
MEDIUM
Minimum Number of Steps to Make Two Strings Anagram
MEDIUM
Number of Distinct Islands
MEDIUM
Substring with Concatenation of All Words
HARD
Logger Rate Limiter
EASY
Distant Barcodes
MEDIUM
Kill Process
MEDIUM
Design A Leaderboard
MEDIUM
First Unique Number
MEDIUM
Invalid Transactions
MEDIUM
Design an Ordered Stream
EASY
Clone Binary Tree With Random Pointer
MEDIUM