Hash Table

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# Title Acceptance Difficulty
760 Find Anagram Mappings 77.4%
Easy
748 Shortest Completing Word 54.3%
Medium
739 Daily Temperatures 53.7%
Medium
734 Sentence Similarity 38.7%
Easy
726 Number of Atoms 44.5%
Hard
720 Longest Word in Dictionary 42.1%
Easy
718 Maximum Length of Repeated Subarray 41.0%
Medium
711 Number of Distinct Islands II 42.9%
Hard
694 Number of Distinct Islands 45.3%
Medium
692 Top K Frequent Words 41.6%
Medium
690 Employee Importance 52.2%
Easy
676 Implement Magic Dictionary 49.6%
Medium
648 Replace Words 47.7%
Medium
645 Set Mismatch 40.0%
Easy
632 Smallest Range 42.4%
Hard
624 Maximum Distance in Arrays 34.8%
Easy
609 Find Duplicate File in System 52.5%
Medium
599 Minimum Index Sum of Two Lists 46.5%
Easy
594 Longest Harmonious Subsequence 41.1%
Easy
575 Distribute Candies 58.3%
Easy
554 Brick Wall 46.1%
Medium
535 Encode and Decode TinyURL 73.9%
Medium
525 Contiguous Array 41.3%
Medium
508 Most Frequent Subtree Sum 52.4%
Medium
500 Keyboard Row 59.8%
Easy
463 Island Perimeter 57.7%
Easy
454 4Sum II 47.6%
Medium
451 Sort Characters By Frequency 51.5%
Medium
447 Number of Boomerangs 46.2%
Easy
438 Find All Anagrams in a String 34.0%
Easy
409 Longest Palindrome 45.7%
Easy
389 Find the Difference 51.1%
Easy
387 First Unique Character in a String 47.3%
Easy
381 Insert Delete GetRandom O(1) - Duplicates allowed 29.4%
Hard
380 Insert Delete GetRandom O(1) 39.8%
Medium
359 Logger Rate Limiter 60.5%
Easy
358 Rearrange String k Distance Apart 31.7%
Hard
356 Line Reflection 30.2%
Medium
355 Design Twitter 25.8%
Medium
350 Intersection of Two Arrays II 44.9%
Easy
349 Intersection of Two Arrays 47.9%
Easy
347 Top K Frequent Elements 49.3%
Medium
340 Longest Substring with At Most K Distinct Characters 39.3%
Hard
336 Palindrome Pairs 27.0%
Hard
325 Maximum Size Subarray Sum Equals k 43.3%
Medium
314 Binary Tree Vertical Order Traversal 37.8%
Medium
311 Sparse Matrix Multiplication 52.2%
Medium
299 Bulls and Cows 35.6%
Medium
290 Word Pattern 33.3%
Easy
288 Unique Word Abbreviation 17.6%
Medium
274 H-Index 33.7%
Medium
266 Palindrome Permutation 57.9%
Easy
249 Group Shifted Strings 43.4%
Medium
246 Strobogrammatic Number 40.2%
Easy
244 Shortest Word Distance II 40.5%
Medium
242 Valid Anagram 47.2%
Easy
219 Contains Duplicate II 32.7%
Easy
217 Contains Duplicate 46.7%
Easy
205 Isomorphic Strings 34.5%
Easy
204 Count Primes 26.7%
Easy
202 Happy Number 41.3%
Easy
187 Repeated DNA Sequences 32.6%
Medium
170 Two Sum III - Data structure design 25.9%
Easy
166 Fraction to Recurring Decimal 17.9%
Medium
159 Longest Substring with At Most Two Distinct Characters 42.4%
Hard
149 Max Points on a Line 15.2%
Hard
138 Copy List with Random Pointer 26.0%
Medium
136 Single Number 55.2%
Easy
94 Binary Tree Inorder Traversal 48.6%
Medium
85 Maximal Rectangle 29.2%
Hard
76 Minimum Window Substring 26.5%
Hard
49 Group Anagrams 37.3%
Medium
37 Sudoku Solver 31.5%
Hard
36 Valid Sudoku 37.0%
Medium
30 Substring with Concatenation of All Words 22.2%
Hard
18 4Sum 27.3%
Medium
3 Longest Substring Without Repeating Characters 24.6%
Medium
1 Two Sum 36.9%
Easy