Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 815. Bus Routes | Hard | 39.6% | TopicsArrayHash TableBreadth-First Search |
| 2385. Amount of Time for Binary Tree to Be Infected | Medium | 39.6% | TopicsHash TableTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 2461. Maximum Sum of Distinct Subarrays With Length K | Medium | 39.6% | TopicsArrayHash TableSliding Window |
| 24. Swap Nodes in Pairs | Medium | 38.9% | TopicsLinked ListRecursion |
| Wildcard Matching | Hard | 38.9% | TopicsStringDynamic ProgrammingGreedyRecursion |
| 57. Insert Interval | Medium | 38.9% | TopicsArray |
| Partition List | Medium | 38.9% | TopicsLinked ListTwo Pointers |
| Recover Binary Search Tree | Medium | 38.9% | TopicsTreeDepth-First SearchBinary Search TreeBinary Tree |
| 278. First Bad Version | Easy | 38.9% | TopicsBinary SearchInteractive |
| 345. Reverse Vowels of a String | Easy | 38.9% | TopicsTwo PointersString |
| 383. Ransom Note | Easy | 38.9% | TopicsHash TableStringCounting |
| 605. Can Place Flowers | Easy | 38.9% | TopicsArrayGreedy |
| Exclusive Time of Functions | Medium | 38.9% | TopicsArrayStack |
| 827. Making A Large Island | Hard | 38.9% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 1456. Maximum Number of Vowels in a Substring of Given Length | Medium | 38.9% | TopicsStringSliding Window |
| 115. Distinct Subsequences | Hard | 38.2% | TopicsStringDynamic Programming |
| 237. Delete Node in a Linked List | Medium | 38.2% | TopicsLinked List |
| Find K Pairs with Smallest Sums | Medium | 38.2% | TopicsArrayHeap (Priority Queue) |
| 713. Subarray Product Less Than K | Medium | 38.2% | TopicsArrayBinary SearchSliding WindowPrefix Sum |
| 706. Design HashMap | Easy | 38.2% | TopicsArrayHash TableLinked ListDesignHash Function |
| 622. Design Circular Queue | Medium | 38.2% | TopicsArrayLinked ListDesignQueue |
| Product Sales Analysis III | Medium | 38.2% | TopicsDatabase |
| Monthly Transactions I | Medium | 38.2% | TopicsDatabase |
| 1207. Unique Number of Occurrences | Easy | 38.2% | TopicsArrayHash Table |
| 2965. Find Missing and Repeated Values | Easy | 38.2% | TopicsArrayHash TableMathMatrix |
