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17 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2512. Reward Top K Students | Medium | 100% | TopicsArrayHash TableStringSortingHeap (Priority Queue) |
| 2032. Two Out of Three | Easy | 82% | TopicsArrayHash TableBit Manipulation |
| 1948. Delete Duplicate Folders in System | Hard | 79.5% | TopicsArrayHash TableStringDepth-First SearchTrieSortingHash Function |
| 1034. Coloring A Border | Medium | 79.5% | TopicsArrayDepth-First SearchBreadth-First SearchMatrix |
| 2146. K Highest Ranked Items Within a Price Range | Medium | 79.5% | TopicsArrayBreadth-First SearchSortingHeap (Priority Queue)Matrix |
| Order Two Columns Independently | Medium | 79.5% | TopicsDatabase |
| Sliding Window Maximum | Hard | 69.5% | TopicsArrayQueueSliding WindowHeap (Priority Queue)Monotonic QueueRange Minimum/Maximum Query |
| 46. Permutations | Medium | 69.5% | TopicsArrayBacktracking |
| 332. Reconstruct Itinerary | Hard | 64.8% | TopicsArrayStringDepth-First SearchGraph TheorySortingHeap (Priority Queue)Eulerian CircuitEulerian PathSemi-Eulerian Graph |
| 12. Integer to Roman | Medium | 64.8% | TopicsHash TableMathString |
| 146. LRU Cache | Medium | 58.7% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 13. Roman to Integer | Easy | 58.7% | TopicsHash TableMathString |
| Maximal Square | Medium | 50.2% | TopicsArrayDynamic ProgrammingMatrix |
| Longest Valid Parentheses | Hard | 50.2% | TopicsStringDynamic ProgrammingStackBracket Sequences |
| 207. Course Schedule | Medium | 50.2% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| 20. Valid Parentheses | Easy | 50.2% | TopicsStringStackBracket Sequences |
| 49. Group Anagrams | Medium | 50.2% | TopicsArrayHash TableStringSorting |
