Hash Table

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# Title Acceptance Difficulty
594 Longest Harmonious Subsequence 37.6% Easy
575 Distribute Candies 60.6% Easy
554 Brick Wall 42.7% Medium
535 Encode and Decode TinyURL 73.9% Medium
525 Contiguous Array 36.9% Medium
508 Most Frequent Subtree Sum 52.0% Medium
500 Keyboard Row 60.2% Easy
463 Island Perimeter 56.9% Easy
454 4Sum II 45.7% Medium
451 Sort Characters By Frequency 50.7% Medium
447 Number of Boomerangs 44.1% Easy
438 Find All Anagrams in a String 33.4% Easy
409 Longest Palindrome 45.2% Easy
389 Find the Difference 51.5% Easy
381 Insert Delete GetRandom O(1) - Duplicates allowed 28.6% Hard
380 Insert Delete GetRandom O(1) 38.9% Medium
359 Logger Rate Limiter 59.1% Easy
358 Rearrange String k Distance Apart 31.8% Hard
356 Line Reflection 30.2% Medium
355 Design Twitter 25.1% Medium
350 Intersection of Two Arrays II 44.3% Easy
349 Intersection of Two Arrays 46.8% Easy
347 Top K Frequent Elements 47.4% Medium
340 Longest Substring with At Most K Distinct Characters 38.5% Hard
336 Palindrome Pairs 25.7% Hard
325 Maximum Size Subarray Sum Equals k 42.1% Medium
314 Binary Tree Vertical Order Traversal 36.1% Medium
311 Sparse Matrix Multiplication 50.6% Medium
299 Bulls and Cows 34.1% Medium
290 Word Pattern 32.7% Easy
288 Unique Word Abbreviation 16.2% Medium
274 H-Index 32.8% Medium
266 Palindrome Permutation 56.3% Easy
249 Group Shifted Strings 40.4% Medium
246 Strobogrammatic Number 39.4% Easy
244 Shortest Word Distance II 36.5% Medium
242 Valid Anagram 45.8% Easy
219 Contains Duplicate II 32.0% Easy
217 Contains Duplicate 45.0% Easy
205 Isomorphic Strings 33.3% Easy
204 Count Primes 26.4% Easy
202 Happy Number 40.2% Easy
187 Repeated DNA Sequences 30.7% Medium
170 Two Sum III - Data structure design 23.8% Easy
166 Fraction to Recurring Decimal 17.2% Medium
159 Longest Substring with At Most Two Distinct Characters 40.5% Hard
149 Max Points on a Line 15.4% Hard
138 Copy List with Random Pointer 26.4% Medium
136 Single Number 53.8% Easy
94 Binary Tree Inorder Traversal 45.6% Medium
85 Maximal Rectangle 27.2% Hard
76 Minimum Window Substring 24.7% Hard
49 Group Anagrams 33.5% Medium
37 Sudoku Solver 29.4% Hard
36 Valid Sudoku 35.0% Medium
30 Substring with Concatenation of All Words 21.8% Hard
18 4Sum 26.3% Medium
3 Longest Substring Without Repeating Characters 24.1% Medium
1 Two Sum 33.1% Easy
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