Yelp
28 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 1436. Destination City | Easy | 100% | TopicsArrayHash TableString |
| 2038. Remove Colored Pieces if Both Neighbors are the Same Color | Medium | 100% | TopicsMathStringGreedyGame Theory |
| 1333. Filter Restaurants by Vegan-Friendly, Price and Distance | Medium | 97.3% | TopicsArraySorting |
| 1. Two Sum | Easy | 94.2% | TopicsArrayHash Table |
| 3. Longest Substring Without Repeating Characters | Medium | 94.2% | TopicsHash TableStringSliding Window |
| 14. Longest Common Prefix | Easy | 94.2% | TopicsArrayStringTrie |
| 49. Group Anagrams | Medium | 94.2% | TopicsArrayHash TableStringSorting |
| 56. Merge Intervals | Medium | 94.2% | TopicsArraySortingQuicksort |
| Word Ladder II | Hard | 94.2% | TopicsHash TableStringBacktrackingBreadth-First SearchBidirectional Search |
| 127. Word Ladder | Hard | 94.2% | TopicsHash TableStringBreadth-First SearchBidirectional Search |
| Reverse Words in a String | Medium | 94.2% | TopicsTwo PointersString |
| Active Businesses | Medium | 94.2% | TopicsDatabase |
| 206. Reverse Linked List | Easy | 94.2% | TopicsLinked ListRecursion |
| 207. Course Schedule | Medium | 94.2% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| The Skyline Problem | Hard | 94.2% | TopicsArrayDivide and ConquerBinary Indexed TreeSegment TreeSweep LineSortingHeap (Priority Queue)Ordered Set |
| 242. Valid Anagram | Easy | 94.2% | TopicsHash TableStringSorting |
| 347. Top K Frequent Elements | Medium | 94.2% | TopicsArrayHash TableDivide and ConquerSortingHeap (Priority Queue)Bucket SortCountingQuickselect |
| Insert Delete GetRandom O(1) | Medium | 94.2% | TopicsArrayHash TableMathDesignRandomized |
| Insert Delete GetRandom O(1) - Duplicates allowed | Hard | 94.2% | TopicsArrayHash TableMathDesignRandomized |
| Decode String | Medium | 94.2% | TopicsStringStackRecursion |
| 443. String Compression | Medium | 94.2% | TopicsTwo PointersString |
| 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence | Easy | 94.2% | TopicsTwo PointersStringString Matching |
| Find the Closest Palindrome | Hard | 94.2% | TopicsMathString |
| Minimum Index Sum of Two Lists | Easy | 94.2% | TopicsArrayHash TableString |
| 692. Top K Frequent Words | Medium | 94.2% | TopicsArrayHash TableStringTrieSortingHeap (Priority Queue)Bucket SortCounting |
