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1396 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2657. Find the Prefix Common Array of Two Arrays | Medium | 20.2% | TopicsArrayHash TableBit Manipulation |
| 802. Find Eventual Safe States | Medium | 20.2% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortKosaraju's AlgorithmTarjan's SCC Algorithm |
| 1200. Minimum Absolute Difference | Easy | 20.2% | TopicsArraySorting |
| 1732. Find the Highest Altitude | Easy | 20.2% | TopicsArrayPrefix Sum |
| Longest Harmonious Subsequence | Easy | 20.2% | TopicsArrayHash TableSliding WindowSortingCounting |
| 781. Rabbits in Forest | Medium | 20.2% | TopicsArrayHash TableMathGreedy |
| 2145. Count the Hidden Sequences | Medium | 20.2% | TopicsArrayPrefix Sum |
| 2566. Maximum Difference by Remapping a Digit | Easy | 20.2% | TopicsMathGreedy |
| 97. Interleaving String | Medium | 20.2% | TopicsStringDynamic Programming |
| 1502. Can Make Arithmetic Progression From Sequence | Easy | 20.2% | TopicsArraySorting |
| 3507. Minimum Pair Removal to Sort Array I | Easy | 20.2% | TopicsArrayHash TableLinked ListHeap (Priority Queue)SimulationDoubly-Linked ListOrdered Set |
| 3090. Maximum Length Substring With Two Occurrences | Easy | 20.2% | TopicsHash TableStringSliding Window |
| Dungeon Game | Hard | 17.8% | TopicsArrayDynamic ProgrammingMatrix |
| Bulb Switcher | Medium | 17.8% | TopicsMathBrainteaser |
| Largest BST Subtree | Medium | 17.8% | TopicsDynamic ProgrammingTreeDepth-First SearchBinary Search TreeBinary TreeDP on Trees |
| Insert Delete GetRandom O(1) - Duplicates allowed | Hard | 17.8% | TopicsArrayHash TableMathDesignRandomized |
| Longest Absolute File Path | Medium | 17.8% | TopicsStringStackDepth-First Search |
| 389. Find the Difference | Easy | 17.8% | TopicsHash TableStringBit ManipulationSorting |
| Validate IP Address | Medium | 17.8% | TopicsString |
| Add Bold Tag in String | Medium | 17.8% | TopicsArrayHash TableStringTrieString MatchingAho–Corasick Algorithm |
| Merge Two Binary Trees | Easy | 17.8% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Maximum Product of Three Numbers | Easy | 17.8% | TopicsArrayMathSorting |
| Flatten a Multilevel Doubly Linked List | Medium | 17.8% | TopicsLinked ListDepth-First SearchDoubly-Linked List |
| 763. Partition Labels | Medium | 17.8% | TopicsHash TableTwo PointersStringGreedy |
| Search in a Binary Search Tree | Easy | 17.8% | TopicsTreeBinary Search TreeBinary Tree |
