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Companies
Citadel
Hash Table
Hash Table
0/24 solved
Subarray Sum Equals K
MEDIUM
LRU Cache
MEDIUM
Group Anagrams
MEDIUM
Letter Combinations of a Phone Number
MEDIUM
Construct Binary Tree from Preorder and Inorder Traversal
MEDIUM
Word Ladder
HARD
Implement Trie (Prefix Tree)
MEDIUM
Sudoku Solver
HARD
Insert Delete GetRandom O(1)
MEDIUM
Reorganize String
MEDIUM
Delete and Earn
MEDIUM
Integer to Roman
MEDIUM
Longest String Chain
MEDIUM
Subarray Sums Divisible by K
MEDIUM
Word Ladder II
HARD
LFU Cache
HARD
Open the Lock
MEDIUM
Count Number of Nice Subarrays
MEDIUM
Bus Routes
HARD
Insert Delete GetRandom O(1) - Duplicates allowed
HARD
Design In-Memory File System
HARD
Length of Longest Subarray With at Most K Frequency
MEDIUM
First Completely Painted Row or Column
MEDIUM
Maximum Total Damage With Spell Casting
MEDIUM