Apple
282 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 22. Generate Parentheses | Medium | 43.2% | TopicsStringDynamic ProgrammingBacktrackingBracket Sequences |
| 162. Find Peak Element | Medium | 43.2% | TopicsArrayBinary Search |
| 344. Reverse String | Easy | 43.2% | TopicsTwo PointersString |
| Decode String | Medium | 43.2% | TopicsStringStackRecursion |
| 787. Cheapest Flights Within K Stops | Medium | 43.2% | TopicsDynamic ProgrammingDepth-First SearchBreadth-First SearchGraph TheoryHeap (Priority Queue)Shortest Path |
| 876. Middle of the Linked List | Easy | 43.2% | TopicsLinked ListTwo Pointers |
| Lowest Common Ancestor of a Binary Tree III | Medium | 43.2% | TopicsHash TableTwo PointersTreeBinary TreeBinary LiftingLowest Common Ancestor |
| 855. Exam Room | Medium | 43.2% | TopicsDesignHeap (Priority Queue)Ordered Set |
| 2150. Find All Lonely Numbers in the Array | Medium | 43.2% | TopicsArrayHash TableCounting |
| 2502. Design Memory Allocator | Medium | 43.2% | TopicsArrayHash TableDesignSimulation |
| 1049. Last Stone Weight II | Medium | 43.2% | TopicsArrayDynamic ProgrammingKnapsack Problem0-1 Knapsack |
| 2. Add Two Numbers | Medium | 39.6% | TopicsLinked ListMathRecursion |
| 13. Roman to Integer | Easy | 39.6% | TopicsHash TableMathString |
| 33. Search in Rotated Sorted Array | Medium | 39.6% | TopicsArrayBinary Search |
| 57. Insert Interval | Medium | 39.6% | TopicsArray |
| Text Justification | Hard | 39.6% | TopicsArrayStringSimulation |
| 79. Word Search | Medium | 39.6% | TopicsArrayStringBacktrackingDepth-First SearchMatrix |
| 134. Gas Station | Medium | 39.6% | TopicsArrayGreedy |
| Two Sum II - Input Array Is Sorted | Medium | 39.6% | TopicsArrayTwo PointersBinary Search |
| 994. Rotting Oranges | Medium | 39.6% | TopicsArrayBreadth-First SearchMatrix |
| 2591. Distribute Money to Maximum Children | Easy | 39.6% | TopicsMathGreedy |
| 112. Path Sum | Easy | 39.6% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 309. Best Time to Buy and Sell Stock with Cooldown | Medium | 39.6% | TopicsArrayDynamic Programming |
| Total Hamming Distance | Medium | 39.6% | TopicsArrayMathBit Manipulation |
| Serialize and Deserialize N-ary Tree | Hard | 39.6% | TopicsStringTreeDepth-First SearchBreadth-First Search |
