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65 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 5. Longest Palindromic Substring | Medium | 54.8% | TopicsTwo PointersStringDynamic ProgrammingManacher |
| 56. Merge Intervals | Medium | 54.8% | TopicsArraySortingQuicksort |
| Largest Number | Medium | 54.8% | TopicsArrayStringGreedySorting |
| 206. Reverse Linked List | Easy | 54.8% | TopicsLinked ListRecursion |
| 215. Kth Largest Element in an Array | Medium | 54.8% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Quickselect |
| 283. Move Zeroes | Easy | 54.8% | TopicsArrayTwo Pointers |
| Asteroid Collision | Medium | 54.8% | TopicsArrayStackSimulation |
| 994. Rotting Oranges | Medium | 54.8% | TopicsArrayBreadth-First SearchMatrix |
| LFU Cache | Hard | 54.8% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 1611. Minimum One Bit Operations to Make Integers Zero | Hard | 54.8% | TopicsMathDynamic ProgrammingBit ManipulationRecursionMemoization |
| Pow(x, n) | Medium | 54.8% | TopicsMathRecursion |
| 2385. Amount of Time for Binary Tree to Be Infected | Medium | 54.8% | TopicsHash TableTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 199. Binary Tree Right Side View | Medium | 54.8% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 417. Pacific Atlantic Water Flow | Medium | 54.8% | TopicsArrayDepth-First SearchBreadth-First SearchMatrix |
| 17. Letter Combinations of a Phone Number | Medium | 54.8% | TopicsHash TableStringBacktracking |
| 4Sum | Medium | 54.8% | TopicsArrayTwo PointersSorting |
| Number of Distinct Islands | Medium | 54.8% | TopicsArrayHash TableDepth-First SearchBreadth-First SearchUnion-FindSortingMatrixHash Function |
| Next Permutation | Medium | 54.8% | TopicsArrayTwo Pointers |
| 134. Gas Station | Medium | 54.8% | TopicsArrayGreedy |
| 162. Find Peak Element | Medium | 54.8% | TopicsArrayBinary Search |
| 494. Target Sum | Medium | 54.8% | TopicsArrayDynamic ProgrammingBacktrackingKnapsack Problem0-1 Knapsack |
| 540. Single Element in a Sorted Array | Medium | 54.8% | TopicsArrayBinary Search |
| 347. Top K Frequent Elements | Medium | 54.8% | TopicsArrayHash TableDivide and ConquerSortingHeap (Priority Queue)Bucket SortCountingQuickselect |
| 992. Subarrays with K Different Integers | Hard | 54.8% | TopicsArrayHash TableSliding WindowCounting |
| 213. House Robber II | Medium | 54.8% | TopicsArrayDynamic Programming |
