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Companies
Microsoft
Hash Table
Hash Table
0/82 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
Linked List Cycle
EASY
Construct Binary Tree from Preorder and Inorder Traversal
MEDIUM
Intersection of Two Linked Lists
EASY
Roman to Integer
EASY
Set Matrix Zeroes
MEDIUM
Copy List with Random Pointer
MEDIUM
Linked List Cycle II
MEDIUM
Missing Number
EASY
Valid Anagram
EASY
Find All Anagrams in a String
MEDIUM
Contains Duplicate
EASY
Word Ladder
HARD
Permutation in String
MEDIUM
Implement Trie (Prefix Tree)
MEDIUM
Valid Sudoku
MEDIUM
Task Scheduler
MEDIUM
Find All Duplicates in an Array
MEDIUM
Sudoku Solver
HARD
Clone Graph
MEDIUM
Insert Delete GetRandom O(1)
MEDIUM
First Unique Character in a String
EASY
Reorganize String
MEDIUM
Next Greater Element I
EASY
Construct Binary Tree from Inorder and Postorder Traversal
MEDIUM
Vertical Order Traversal of a Binary Tree
HARD
Intersection of Two Arrays II
EASY
Top K Frequent Words
MEDIUM
Integer to Roman
MEDIUM
Word Break II
HARD
Accounts Merge
MEDIUM
Two Sum IV - Input is a BST
EASY
Word Ladder II
HARD
LFU Cache
HARD
Number of Good Pairs
EASY
Design HashMap
EASY
Ransom Note
EASY
Minimum Deletions to Make Character Frequencies Unique
MEDIUM
Time Based Key-Value Store
MEDIUM
Maximum Frequency Stack
HARD
Design Twitter
MEDIUM
Find and Replace Pattern
MEDIUM
Number of Substrings Containing All Three Characters
MEDIUM
Longest Substring with At Most K Distinct Characters
MEDIUM
Minimum Number of Steps to Make Two Strings Anagram
MEDIUM
Letter Tile Possibilities
MEDIUM
Find the Longest Substring Containing Vowels in Even Counts
MEDIUM
Number of Distinct Islands
MEDIUM
Count Unique Characters of All Substrings of a Given String
HARD
Employee Importance
MEDIUM
Design Tic-Tac-Toe
MEDIUM
Maximum Size Subarray Sum Equals k
MEDIUM
Encode and Decode TinyURL
MEDIUM
Substring with Concatenation of All Words
HARD
Number of Atoms
HARD
Maximum Number of Balloons
EASY
Logger Rate Limiter
EASY
Distribute Candies
EASY
Design In-Memory File System
HARD
Lowest Common Ancestor of a Binary Tree III
MEDIUM
Longest Nice Substring
EASY
Find Lucky Integer in an Array
EASY
Count Substrings That Differ by One Character
MEDIUM
Palindrome Permutation
EASY
Rearrange String k Distance Apart
HARD
Design Snake Game
MEDIUM
Palindrome Permutation II
MEDIUM
Strobogrammatic Number
EASY
First Unique Number
MEDIUM
Making File Names Unique
MEDIUM
Lonely Pixel I
MEDIUM