2324 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 773. Sliding Puzzle | Hard | 8.2% | TopicsArrayDynamic ProgrammingBacktrackingBreadth-First SearchMemoizationMatrixHeuristic SearchBidirectional SearchA* Search |
| 1991. Find the Middle Index in Array | Easy | 8.2% | TopicsArrayPrefix Sum |
| Reconstruct Original Digits from English | Medium | 8.2% | TopicsHash TableMathString |
| 2593. Find Score of an Array After Marking All Elements | Medium | 8.2% | TopicsArrayHash TableSortingHeap (Priority Queue)Simulation |
| 2471. Minimum Number of Operations to Sort a Binary Tree by Level | Medium | 8.2% | TopicsTreeBreadth-First SearchBinary Tree |
| 3203. Find Minimum Diameter After Merging Two Trees | Hard | 8.2% | TopicsTreeDepth-First SearchBreadth-First SearchGraph Theory |
| 3410. Maximize Subarray Sum After Removing All Occurrences of One Element | Hard | 8.2% | TopicsArrayHash TableDivide and ConquerDynamic ProgrammingSegment TreePrefix Sum |
| Convert BST to Greater Tree | Medium | 8.2% | TopicsTreeDepth-First SearchBinary Search TreeBinary Tree |
| 2429. Minimize XOR | Medium | 8.2% | TopicsGreedyBit Manipulation |
| 2815. Max Pair Sum in an Array | Easy | 8.2% | TopicsArrayHash Table |
| 2017. Grid Game | Medium | 8.2% | TopicsArrayMatrixPrefix Sum |
| 1773. Count Items Matching a Rule | Easy | 8.2% | TopicsArrayString |
| 2948. Make Lexicographically Smallest Array by Swapping Elements | Medium | 8.2% | TopicsArrayUnion-FindSorting |
| 2845. Count of Interesting Subarrays | Medium | 8.2% | TopicsArrayHash TablePrefix Sum |
| 3434. Maximum Frequency After Subarray Operation | Medium | 8.2% | TopicsArrayHash TableDynamic ProgrammingGreedyEnumerationPrefix Sum |
| 3105. Longest Strictly Increasing or Strictly Decreasing Subarray | Easy | 8.2% | TopicsArray |
| 1790. Check if One String Swap Can Make Strings Equal | Easy | 8.2% | TopicsHash TableStringCounting |
| 965. Univalued Binary Tree | Easy | 8.2% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 1524. Number of Sub-arrays With Odd Sum | Medium | 8.2% | TopicsArrayMathDynamic ProgrammingPrefix Sum |
| 2615. Sum of Distances | Medium | 8.2% | TopicsArrayHash TablePrefix Sum |
| 3285. Find Indices of Stable Mountains | Easy | 8.2% | TopicsArray |
| 2685. Count the Number of Complete Components | Medium | 8.2% | TopicsDepth-First SearchBreadth-First SearchUnion-FindGraph Theory |
| 2033. Minimum Operations to Make a Uni-Value Grid | Medium | 8.2% | TopicsArrayMathSortingMatrix |
| 2503. Maximum Number of Points From Grid Queries | Hard | 8.2% | TopicsArrayTwo PointersBreadth-First SearchUnion-FindSortingHeap (Priority Queue)Matrix |
| 2818. Apply Operations to Maximize Score | Hard | 8.2% | TopicsArrayMathStackGreedySortingMonotonic StackNumber Theory |
