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Companies
Oracle
Hash Table
Hash Table
0/41 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
Missing Number
EASY
Valid Anagram
EASY
Word Ladder
HARD
Implement Trie (Prefix Tree)
MEDIUM
Valid Sudoku
MEDIUM
Sudoku Solver
HARD
Insert Delete GetRandom O(1)
MEDIUM
Isomorphic Strings
EASY
Intersection of Two Arrays II
EASY
Top K Frequent Words
MEDIUM
Integer to Roman
MEDIUM
Word Break II
HARD
Design HashMap
EASY
Time Based Key-Value Store
MEDIUM
Max Points on a Line
HARD
Brick Wall
MEDIUM
Least Number of Unique Integers after K Removals
MEDIUM
Design Tic-Tac-Toe
MEDIUM
Minimum Index Sum of Two Lists
EASY
Logger Rate Limiter
EASY
Count Number of Pairs With Absolute Difference K
EASY
Find Subsequence of Length K With the Largest Sum
EASY
HTML Entity Parser
MEDIUM