TikTok
317 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 1. Two Sum | Easy | 66.5% | TopicsArrayHash Table |
| Longest Consecutive Sequence | Medium | 66.5% | TopicsArrayHash TableUnion-Find |
| Basic Calculator II | Medium | 66.5% | TopicsMathStringStack |
| 347. Top K Frequent Elements | Medium | 66.5% | TopicsArrayHash TableDivide and ConquerSortingHeap (Priority Queue)Bucket SortCountingQuickselect |
| Basic Calculator III | Hard | 66.5% | TopicsMathStringStackRecursion |
| 5. Longest Palindromic Substring | Medium | 64.8% | TopicsTwo PointersStringDynamic ProgrammingManacher |
| Sqrt(x) | Easy | 64.8% | TopicsMathBinary SearchNewton's Method |
| 678. Valid Parenthesis String | Medium | 64.8% | TopicsStringDynamic ProgrammingStackGreedyBracket Sequences |
| 22. Generate Parentheses | Medium | 62.8% | TopicsStringDynamic ProgrammingBacktrackingBracket Sequences |
| 23. Merge k Sorted Lists | Hard | 62.8% | TopicsLinked ListDivide and ConquerHeap (Priority Queue)Merge SortTournament Sort |
| 121. Best Time to Buy and Sell Stock | Easy | 62.8% | TopicsArrayDynamic Programming |
| 215. Kth Largest Element in an Array | Medium | 62.8% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Quickselect |
| 739. Daily Temperatures | Medium | 62.8% | TopicsArrayStackMonotonic Stack |
| 105. Construct Binary Tree from Preorder and Inorder Traversal | Medium | 60.7% | TopicsArrayHash TableDivide and ConquerTreeBinary Tree |
| 2145. Count the Hidden Sequences | Medium | 60.7% | TopicsArrayPrefix Sum |
| 3389. Minimum Operations to Make Character Frequencies Equal | Hard | 60.7% | TopicsHash TableStringDynamic ProgrammingCountingEnumeration |
| 3441. Minimum Cost Good Caption | Hard | 60.7% | TopicsStringDynamic Programming |
| 3474. Lexicographically Smallest Generated String | Hard | 60.7% | TopicsStringGreedyString Matching |
| 20. Valid Parentheses | Easy | 58.4% | TopicsStringStackBracket Sequences |
| 25. Reverse Nodes in k-Group | Hard | 58.4% | TopicsLinked ListRecursion |
| Simplify Path | Medium | 58.4% | TopicsStringStack |
| 127. Word Ladder | Hard | 58.4% | TopicsHash TableStringBreadth-First SearchBidirectional Search |
| 199. Binary Tree Right Side View | Medium | 58.4% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 206. Reverse Linked List | Easy | 58.4% | TopicsLinked ListRecursion |
| 295. Find Median from Data Stream | Hard | 58.4% | TopicsTwo PointersDesignSortingHeap (Priority Queue)Data Stream |
