2324 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Fibonacci Number | Easy | 46.1% | TopicsMathDynamic ProgrammingRecursionMemoization |
| 287. Find the Duplicate Number | Medium | 45.8% | TopicsArrayTwo PointersBinary SearchBit ManipulationPigeonhole PrincipleFloyd's Cycle Finding Algorithm |
| 416. Partition Equal Subset Sum | Medium | 45.8% | TopicsArrayDynamic ProgrammingKnapsack Problem0-1 Knapsack |
| 72. Edit Distance | Medium | 45.8% | TopicsStringDynamic Programming |
| 204. Count Primes | Medium | 45.8% | TopicsArrayMathEnumerationNumber TheoryPrimality TestSieve TheoryPrime Number Sieve |
| Minimum Size Subarray Sum | Medium | 45.8% | TopicsArrayBinary SearchSliding WindowPrefix Sum |
| 3453. Separate Squares I | Medium | 45.8% | TopicsArrayBinary Search |
| 100. Same Tree | Easy | 45.6% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 268. Missing Number | Easy | 45.6% | TopicsArrayHash TableMathBinary SearchBit ManipulationSorting |
| 37. Sudoku Solver | Hard | 45.6% | TopicsArrayHash TableBacktrackingMatrixAlgorithm XDancing Links |
| 45. Jump Game II | Medium | 45.3% | TopicsArrayDynamic ProgrammingGreedy |
| 205. Isomorphic Strings | Easy | 45.3% | TopicsHash TableString |
| 345. Reverse Vowels of a String | Easy | 45.3% | TopicsTwo PointersString |
| 12. Integer to Roman | Medium | 45% | TopicsHash TableMathString |
| 402. Remove K Digits | Medium | 45% | TopicsStringStackGreedyMonotonic Stack |
| 496. Next Greater Element I | Easy | 45% | TopicsArrayHash TableStackMonotonic Stack |
| 57. Insert Interval | Medium | 44.7% | TopicsArray |
| Second Highest Salary | Medium | 44.7% | TopicsDatabase |
| Next Greater Element II | Medium | 44.7% | TopicsArrayStackMonotonic Stack |
| Maximum Average Subarray I | Easy | 44.7% | TopicsArraySliding Window |
| 3623. Count Number of Trapezoids I | Medium | 44.7% | TopicsArrayHash TableMathGeometry |
| 90. Subsets II | Medium | 44.4% | TopicsArrayBacktrackingBit Manipulation |
| 387. First Unique Character in a String | Easy | 44.4% | TopicsHash TableStringQueueCounting |
| 852. Peak Index in a Mountain Array | Medium | 44.4% | TopicsArrayBinary SearchTernary Search |
| 977. Squares of a Sorted Array | Easy | 44.4% | TopicsArrayTwo PointersSorting |
