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Hash Table
Hash Table
0/116 solved
Two Sum
EASY
Longest Substring Without Repeating Characters
MEDIUM
Subarray Sum Equals K
MEDIUM
LRU Cache
MEDIUM
Longest Consecutive Sequence
MEDIUM
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
Roman to Integer
EASY
Copy List with Random Pointer
MEDIUM
Missing Number
EASY
Valid Anagram
EASY
Word Ladder
HARD
Implement Trie (Prefix Tree)
MEDIUM
All Nodes Distance K in Binary Tree
MEDIUM
Longest Repeating Character Replacement
MEDIUM
Task Scheduler
MEDIUM
Majority Element II
MEDIUM
Clone Graph
MEDIUM
Isomorphic Strings
EASY
First Unique Character in a String
EASY
Reorganize String
MEDIUM
Construct Binary Tree from Inorder and Postorder Traversal
MEDIUM
Top K Frequent Words
MEDIUM
Integer to Roman
MEDIUM
Word Pattern
EASY
Longest String Chain
MEDIUM
Word Break II
HARD
Accounts Merge
MEDIUM
Contains Duplicate II
EASY
Subarrays with K Different Integers
HARD
Word Ladder II
HARD
Most Stones Removed with Same Row or Column
MEDIUM
Find Duplicate Subtrees
MEDIUM
LFU Cache
HARD
Number of Matching Subsequences
MEDIUM
Minimum Operations to Reduce X to Zero
MEDIUM
Design HashMap
EASY
Find the Difference
EASY
Time Based Key-Value Store
MEDIUM
Fruit Into Baskets
MEDIUM
Longest Arithmetic Subsequence
MEDIUM
Delete Nodes And Return Forest
MEDIUM
Max Points on a Line
HARD
Design HashSet
EASY
Jump Game IV
HARD
Snapshot Array
MEDIUM
Number of Submatrices That Sum to Target
HARD
Repeated DNA Sequences
MEDIUM
Hand of Straights
MEDIUM
Sliding Window Median
HARD
Longest Arithmetic Subsequence of Given Difference
MEDIUM
Unique Email Addresses
EASY
Word Subsets
MEDIUM
Bulls and Cows
MEDIUM
Check If N and Its Double Exist
EASY
Check If a String Contains All Binary Codes of Size K
MEDIUM
Longest Substring with At Most Two Distinct Characters
MEDIUM
Fraction to Recurring Decimal
MEDIUM
Employee Importance
MEDIUM
Number of Good Ways to Split a String
MEDIUM
Number of Islands II
HARD
Arithmetic Subarrays
MEDIUM
X of a Kind in a Deck of Cards
EASY
Logger Rate Limiter
EASY
Find Two Non-overlapping Sub-arrays Each With Target Sum
MEDIUM
Group Shifted Strings
MEDIUM
Largest Component Size by Common Factor
HARD
Avoid Flood in The City
MEDIUM
Array of Doubled Pairs
MEDIUM
Design In-Memory File System
HARD
Split a String Into the Max Number of Unique Substrings
MEDIUM
Sum of Beauty of All Substrings
MEDIUM
Find And Replace in String
MEDIUM
Smallest Integer Divisible by K
MEDIUM
Linked List Components
MEDIUM
Maximum Number of Non-Overlapping Subarrays With Sum Equals Target
MEDIUM
Palindrome Permutation
EASY
Online Election
MEDIUM
Find Elements in a Contaminated Binary Tree
MEDIUM
Minimum Number of Flips to Convert Binary Matrix to Zero Matrix
HARD
Alphabet Board Path
MEDIUM
String Transforms Into Another String
HARD
Number of Boomerangs
MEDIUM
Magic Squares In Grid
MEDIUM
Design A Leaderboard
MEDIUM
Minimum Operations to Make a Subsequence
HARD
Compare Strings by Frequency of the Smallest Character
MEDIUM
Escape a Large Maze
HARD
Find Latest Group of Size M
MEDIUM
Tuple with Same Product
MEDIUM
Find Anagram Mappings
EASY
Strobogrammatic Number
EASY
Shortest Completing Word
EASY
Single-Row Keyboard
EASY
Longest Uncommon Subsequence II
MEDIUM
Evaluate the Bracket Pairs of a String
MEDIUM
Parse Lisp Expression
HARD
Find Root of N-Ary Tree
MEDIUM
Largest Values From Labels
MEDIUM
Random Flip Matrix
MEDIUM
Vowel Spellchecker
MEDIUM
People Whose List of Favorite Companies Is Not a Subset of Another List
MEDIUM
Design Phone Directory
MEDIUM
Change Minimum Characters to Satisfy One of Three Conditions
MEDIUM
Design Most Recently Used Queue
MEDIUM
Bold Words in String
MEDIUM
Correct a Binary Tree
MEDIUM
Unique Word Abbreviation
MEDIUM
Check If Two Expression Trees are Equivalent
MEDIUM
Lonely Pixel II
MEDIUM
Count Pairs of Equal Substrings With Minimum Difference
MEDIUM