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1396 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 846. Hand of Straights | Medium | 17.8% | TopicsArrayHash TableGreedySorting |
| 1254. Number of Closed Islands | Medium | 17.8% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 1293. Shortest Path in a Grid with Obstacles Elimination | Hard | 17.8% | TopicsArrayBreadth-First SearchMatrix |
| 1448. Count Good Nodes in Binary Tree | Medium | 17.8% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 1631. Path With Minimum Effort | Medium | 17.8% | TopicsArrayBinary SearchDepth-First SearchBreadth-First SearchUnion-FindHeap (Priority Queue)MatrixDijkstra's Algorithm |
| Find a Peak Element II | Medium | 17.8% | TopicsArrayBinary SearchMatrix |
| 1930. Unique Length-3 Palindromic Subsequences | Medium | 17.8% | TopicsHash TableStringBit ManipulationPrefix Sum |
| Confirmation Rate | Medium | 17.8% | TopicsDatabase |
| Find if Path Exists in Graph | Easy | 17.8% | TopicsDepth-First SearchBreadth-First SearchUnion-FindGraph Theory |
| 2090. K Radius Subarray Averages | Medium | 17.8% | TopicsArraySliding Window |
| Counter | Easy | 17.8% | Topics— |
| To Be Or Not To Be | Easy | 17.8% | Topics— |
| 263. Ugly Number | Easy | 17.8% | TopicsMath |
| Count of Smaller Numbers After Self | Hard | 17.8% | TopicsArrayBinary SearchDivide and ConquerBinary Indexed TreeSegment TreeMerge SortOrdered SetTreap |
| 413. Arithmetic Slices | Medium | 17.8% | TopicsArrayDynamic ProgrammingSliding Window |
| 1233. Remove Sub-Folders from the Filesystem | Medium | 17.8% | TopicsArrayStringDepth-First SearchTrie |
| 1636. Sort Array by Increasing Frequency | Easy | 17.8% | TopicsArrayHash TableSorting |
| Perfect Number | Easy | 17.8% | TopicsMath |
| Percentage of Users Attended a Contest | Easy | 17.8% | TopicsDatabase |
| 1861. Rotating the Box | Medium | 17.8% | TopicsArrayTwo PointersMatrix |
| 1822. Sign of the Product of an Array | Easy | 17.8% | TopicsArrayMath |
| 1422. Maximum Score After Splitting a String | Easy | 17.8% | TopicsStringPrefix Sum |
| 2381. Shifting Letters II | Medium | 17.8% | TopicsArrayStringPrefix Sum |
| 2116. Check if a Parentheses String Can Be Valid | Medium | 17.8% | TopicsStringStackGreedyBracket Sequences |
| 941. Valid Mountain Array | Easy | 17.8% | TopicsArray |
