Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Non-decreasing Array | Medium | 5% | TopicsArray |
| Implement Trie II (Prefix Tree) | Medium | 5% | TopicsHash TableStringDesignTrie |
| 2513. Minimize the Maximum of Two Arrays | Medium | 5% | TopicsMathBinary SearchNumber TheoryLeast Common MultipleInclusion-Exclusion Principle |
| 1413. Minimum Value to Get Positive Step by Step Sum | Easy | 5% | TopicsArrayPrefix Sum |
| 3484. Design Spreadsheet | Medium | 5% | TopicsArrayHash TableStringDesignMatrix |
| Array Nesting | Medium | 5% | TopicsArrayDepth-First Search |
| Max Sum of Rectangle No Larger Than K | Hard | 5% | TopicsArrayBinary SearchMatrixPrefix SumOrdered Set |
| 3227. Vowels Game in a String | Medium | 5% | TopicsMathStringBrainteaserGame Theory |
| 2457. Minimum Addition to Make Integer Beautiful | Medium | 5% | TopicsMathGreedy |
| 3028. Ant on the Boundary | Easy | 5% | TopicsArraySimulationPrefix Sum |
| 2503. Maximum Number of Points From Grid Queries | Hard | 5% | TopicsArrayTwo PointersBreadth-First SearchUnion-FindSortingHeap (Priority Queue)Matrix |
| 3796. Find Maximum Value in a Constrained Sequence | Medium | 5% | TopicsArrayGreedy |
| 804. Unique Morse Code Words | Easy | 5% | TopicsArrayHash TableString |
| Longest Univalue Path | Medium | 5% | TopicsTreeDepth-First SearchBinary TreeDP on Trees |
| 2808. Minimum Seconds to Equalize a Circular Array | Medium | 5% | TopicsArrayHash Table |
| 2788. Split Strings by Separator | Easy | 5% | TopicsArrayString |
| Word Abbreviation | Hard | 5% | TopicsArrayStringGreedyTrieSorting |
| Find Product Recommendation Pairs | Medium | 5% | TopicsDatabase |
| Median Employee Salary | Hard | 5% | TopicsDatabase |
| 1758. Minimum Changes To Make Alternating Binary String | Easy | 5% | TopicsString |
| 1228. Missing Number In Arithmetic Progression | Easy | 5% | TopicsArrayMath |
| 3129. Find All Possible Stable Binary Arrays I | Medium | 5% | TopicsDynamic ProgrammingPrefix Sum |
| 3795. Minimum Subarray Length With Distinct Sum At Least K | Medium | 5% | TopicsArrayHash TableSliding Window |
| 3296. Minimum Number of Seconds to Make Mountain Height Zero | Medium | 5% | TopicsArrayMathBinary SearchGreedyHeap (Priority Queue) |
| 3427. Sum of Variable Length Subarrays | Easy | 5% | TopicsArrayPrefix Sum |
