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1396 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 792. Number of Matching Subsequences | Medium | 15% | TopicsArrayHash TableStringBinary SearchDynamic ProgrammingTrieSorting |
| Product Sales Analysis I | Easy | 15% | TopicsDatabase |
| To Lower Case | Easy | 15% | TopicsString |
| 1464. Maximum Product of Two Elements in an Array | Easy | 15% | TopicsArraySortingHeap (Priority Queue) |
| 2336. Smallest Number in Infinite Set | Medium | 15% | TopicsHash TableDesignHeap (Priority Queue)Ordered Set |
| 2081. Sum of k-Mirror Numbers | Hard | 15% | TopicsMathEnumeration |
| 2603. Collect Coins in a Tree | Hard | 15% | TopicsArrayTreeGraph TheoryTopological Sort |
| Repeated String Match | Medium | 15% | TopicsStringString MatchingZ AlgorithmKnuth–Morris–Pratt AlgorithmBoyer–Moore String-Search Algorithm |
| 3625. Count Number of Trapezoids II | Hard | 15% | TopicsArrayHash TableMathGeometry |
| Game Play Analysis I | Easy | 15% | TopicsDatabase |
| 2594. Minimum Time to Repair Cars | Medium | 15% | TopicsArrayBinary Search |
| 1466. Reorder Routes to Make All Paths Lead to the City Zero | Medium | 15% | TopicsDepth-First SearchBreadth-First SearchGraph Theory |
| 3541. Find Most Frequent Vowel and Consonant | Easy | 15% | TopicsHash TableStringCounting |
| Valid Triangle Number | Medium | 15% | TopicsArrayTwo PointersBinary SearchGreedySorting |
| 976. Largest Perimeter Triangle | Easy | 15% | TopicsArrayMathGreedySortingQuicksortPolygons |
| Find Books with No Available Copies | Easy | 15% | TopicsDatabase |
| 3228. Maximum Number of Operations to Move Ones to the End | Medium | 15% | TopicsStringGreedyCounting |
| Nth Highest Salary | Medium | 15% | TopicsDatabase |
| 944. Delete Columns to Make Sorted | Easy | 15% | TopicsArrayStringLongest Increasing Subsequence |
| 1339. Maximum Product of Splitted Binary Tree | Medium | 15% | TopicsTreeDepth-First SearchBinary Tree |
| 1392. Longest Happy Prefix | Hard | 15% | TopicsStringRolling HashString MatchingHash FunctionZ AlgorithmKnuth–Morris–Pratt Algorithm |
| 1456. Maximum Number of Vowels in a Substring of Given Length | Medium | 15% | TopicsStringSliding Window |
| 1967. Number of Strings That Appear as Substrings in Word | Easy | 15% | TopicsArrayString |
| 2812. Find the Safest Path in a Grid | Medium | 15% | TopicsArrayBinary SearchBreadth-First SearchUnion-FindHeap (Priority Queue)Matrix |
| Perfect Squares | Medium | 15% | TopicsMathDynamic ProgrammingBreadth-First SearchKnapsack ProblemComplete Knapsack |
