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1396 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 834. Sum of Distances in Tree | Hard | 5% | TopicsDynamic ProgrammingTreeDepth-First SearchGraph TheoryDP on Trees |
| 2672. Number of Adjacent Elements With the Same Color | Medium | 5% | TopicsArray |
| Sort Transformed Array | Medium | 5% | TopicsArrayMathTwo PointersSorting |
| 1442. Count Triplets That Can Form Two Arrays of Equal XOR | Medium | 5% | TopicsArrayHash TableMathBit ManipulationPrefix Sum |
| 2697. Lexicographically Smallest Palindrome | Easy | 5% | TopicsTwo PointersStringGreedy |
| 1727. Largest Submatrix With Rearrangements | Medium | 5% | TopicsArrayGreedySortingMatrix |
| 979. Distribute Coins in Binary Tree | Medium | 5% | TopicsTreeDepth-First SearchBinary TreeDP on Trees |
| 3643. Flip Square Submatrix Vertically | Easy | 5% | TopicsArrayTwo PointersMatrix |
| 2264. Largest 3-Same-Digit Number in String | Easy | 5% | TopicsString |
| 3129. Find All Possible Stable Binary Arrays I | Medium | 5% | TopicsDynamic ProgrammingPrefix Sum |
| 1006. Clumsy Factorial | Medium | 5% | TopicsMathStackSimulation |
| 3592. Inverse Coin Change | Medium | 5% | TopicsArrayDynamic Programming |
| 3024. Type of Triangle | Easy | 5% | TopicsArrayMathSortingPolygons |
| 2751. Robot Collisions | Hard | 5% | TopicsArrayStackSortingSimulation |
| 1289. Minimum Falling Path Sum II | Hard | 5% | TopicsArrayDynamic ProgrammingMatrix |
| 859. Buddy Strings | Easy | 5% | TopicsHash TableString |
| 1492. The kth Factor of n | Medium | 5% | TopicsMathNumber TheoryPrime Factorization |
| 2615. Sum of Distances | Medium | 5% | TopicsArrayHash TablePrefix Sum |
| 1963. Minimum Number of Swaps to Make the String Balanced | Medium | 5% | TopicsTwo PointersStringStackGreedyBracket Sequences |
| 3046. Split the Array | Easy | 5% | TopicsArrayHash TableCounting |
| 1559. Detect Cycles in 2D Grid | Medium | 5% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| Rotate Function | Medium | 5% | TopicsArrayMathDynamic Programming |
| 2248. Intersection of Multiple Arrays | Easy | 5% | TopicsArrayHash TableSortingCounting |
| 3335. Total Characters in String After Transformations I | Medium | 5% | TopicsHash TableMathStringDynamic ProgrammingCounting |
| 1413. Minimum Value to Get Positive Step by Step Sum | Easy | 5% | TopicsArrayPrefix Sum |
