41 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 332. Reconstruct Itinerary | Hard | 100% | TopicsArrayStringDepth-First SearchGraph TheorySortingHeap (Priority Queue)Eulerian CircuitEulerian PathSemi-Eulerian Graph |
| 465. Optimal Account Balancing | Hard | 97.5% | TopicsArrayDynamic ProgrammingBacktrackingBit ManipulationBitmask |
| 815. Bus Routes | Hard | 95.5% | TopicsArrayHash TableBreadth-First Search |
| Expression Add Operators | Hard | 89% | TopicsMathStringBacktracking |
| Shortest Way to Form String | Medium | 82.7% | TopicsTwo PointersStringBinary SearchGreedy |
| 322. Coin Change | Medium | 75.8% | TopicsArrayDynamic ProgrammingBreadth-First SearchKnapsack ProblemComplete Knapsack |
| 2302. Count Subarrays With Score Less Than K | Hard | 70.3% | TopicsArrayBinary SearchSliding WindowPrefix Sum |
| 494. Target Sum | Medium | 70.3% | TopicsArrayDynamic ProgrammingBacktrackingKnapsack Problem0-1 Knapsack |
| Split Array Largest Sum | Hard | 70.3% | TopicsArrayBinary SearchDynamic ProgrammingGreedyPrefix Sum |
| Design Search Autocomplete System | Hard | 68.6% | TopicsStringDepth-First SearchDesignTrieSortingHeap (Priority Queue)Data Stream |
| 392. Is Subsequence | Easy | 66.8% | TopicsTwo PointersStringDynamic Programming |
| Find Median Given Frequency of Numbers | Hard | 62.5% | TopicsDatabase |
| Longest Word in Dictionary | Medium | 62.5% | TopicsArrayHash TableStringTrieSorting |
| 1293. Shortest Path in a Grid with Obstacles Elimination | Hard | 60% | TopicsArrayBreadth-First SearchMatrix |
| 2402. Meeting Rooms III | Hard | 60% | TopicsArrayHash TableSortingHeap (Priority Queue)Simulation |
| 1110. Delete Nodes And Return Forest | Medium | 60% | TopicsArrayHash TableTreeDepth-First SearchBinary Tree |
| Multiply Strings | Medium | 57.1% | TopicsMathStringSimulation |
| 1723. Find Minimum Time to Finish All Jobs | Hard | 57.1% | TopicsArrayDynamic ProgrammingBacktrackingBit ManipulationBitmask |
| Put Boxes Into the Warehouse II | Medium | 57.1% | TopicsArrayGreedySorting |
| Put Boxes Into the Warehouse I | Medium | 57.1% | TopicsArrayGreedySorting |
| 1244. Design A Leaderboard | Medium | 57.1% | TopicsHash TableDesignSorting |
| Sparse Matrix Multiplication | Medium | 53.6% | TopicsArrayHash TableMatrixLinear Algebra |
| 295. Find Median from Data Stream | Hard | 49.4% | TopicsTwo PointersDesignSortingHeap (Priority Queue)Data Stream |
| 443. String Compression | Medium | 49.4% | TopicsTwo PointersString |
| 17. Letter Combinations of a Phone Number | Medium | 43.9% | TopicsHash TableStringBacktracking |
