EBay
67 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 20. Valid Parentheses | Easy | 63.5% | TopicsStringStackBracket Sequences |
| 49. Group Anagrams | Medium | 63.5% | TopicsArrayHash TableStringSorting |
| 127. Word Ladder | Hard | 63.5% | TopicsHash TableStringBreadth-First SearchBidirectional Search |
| 332. Reconstruct Itinerary | Hard | 63.5% | TopicsArrayStringDepth-First SearchGraph TheorySortingHeap (Priority Queue)Eulerian CircuitEulerian PathSemi-Eulerian Graph |
| 752. Open the Lock | Medium | 63.5% | TopicsArrayHash TableStringBreadth-First SearchBidirectional Search |
| 994. Rotting Oranges | Medium | 63.5% | TopicsArrayBreadth-First SearchMatrix |
| 75. Sort Colors | Medium | 63.5% | TopicsArrayTwo PointersSortingQuicksortBubble Sort |
| 581. Shortest Unsorted Continuous Subarray | Medium | 63.5% | TopicsArrayTwo PointersStackGreedySortingMonotonic Stack |
| 97. Interleaving String | Medium | 63.5% | TopicsStringDynamic Programming |
| 45. Jump Game II | Medium | 63.5% | TopicsArrayDynamic ProgrammingGreedy |
| 1743. Restore the Array From Adjacent Pairs | Medium | 63.5% | TopicsArrayHash TableDepth-First Search |
| 79. Word Search | Medium | 63.5% | TopicsArrayStringBacktrackingDepth-First SearchMatrix |
| Decode String | Medium | 63.5% | TopicsStringStackRecursion |
| 3161. Block Placement Queries | Hard | 63.5% | TopicsArrayBinary SearchBinary Indexed TreeSegment TreeOrdered Set |
| 23. Merge k Sorted Lists | Hard | 52.9% | TopicsLinked ListDivide and ConquerHeap (Priority Queue)Merge SortTournament Sort |
| Best Time to Buy and Sell Stock II | Medium | 52.9% | TopicsArrayDynamic ProgrammingGreedy |
| 215. Kth Largest Element in an Array | Medium | 52.9% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Quickselect |
| 1381. Design a Stack With Increment Operation | Medium | 52.9% | TopicsArrayStackDesign |
| 680. Valid Palindrome II | Easy | 52.9% | TopicsTwo PointersStringGreedy |
| 207. Course Schedule | Medium | 52.9% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| 22. Generate Parentheses | Medium | 52.9% | TopicsStringDynamic ProgrammingBacktrackingBracket Sequences |
| 162. Find Peak Element | Medium | 52.9% | TopicsArrayBinary Search |
| Repeated Substring Pattern | Easy | 52.9% | TopicsStringString MatchingZ AlgorithmKnuth–Morris–Pratt Algorithm |
| 286. Walls and Gates | Medium | 52.9% | TopicsArrayBreadth-First SearchMatrix |
| 234. Palindrome Linked List | Easy | 52.9% | TopicsLinked ListTwo PointersStackRecursion |
