Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2258. Escape the Spreading Fire | Hard | 13.2% | TopicsArrayBinary SearchBreadth-First SearchMatrix |
| 2239. Find Closest Number to Zero | Easy | 13.2% | TopicsArray |
| Root Equals Sum of Children | Easy | 13.2% | TopicsTreeBinary Tree |
| 2401. Longest Nice Subarray | Medium | 13.2% | TopicsArrayBit ManipulationSliding Window |
| Array Prototype Last | Easy | 13.2% | Topics— |
| 2799. Count Complete Subarrays in an Array | Medium | 13.2% | TopicsArrayHash TableSliding Window |
| 2824. Count Pairs Whose Sum is Less than Target | Easy | 13.2% | TopicsArrayTwo PointersBinary SearchSorting |
| 2962. Count Subarrays Where Max Element Appears at Least K Times | Medium | 13.2% | TopicsArraySliding Window |
| 2966. Divide Array Into Arrays With Max Difference | Medium | 13.2% | TopicsArrayGreedySorting |
| 3202. Find the Maximum Length of Valid Subsequence II | Medium | 13.2% | TopicsArrayDynamic Programming |
| 2094. Finding 3-Digit Even Numbers | Easy | 13.2% | TopicsArrayHash TableRecursionSortingEnumeration |
| 3136. Valid Word | Easy | 13.2% | TopicsString |
| 3191. Minimum Operations to Make Binary Array Elements Equal to One I | Medium | 13.2% | TopicsArrayBit ManipulationQueueSliding WindowPrefix Sum |
| 989. Add to Array-Form of Integer | Easy | 13.2% | TopicsArrayMath |
| 1780. Check if Number is a Sum of Powers of Three | Medium | 13.2% | TopicsMath |
| 916. Word Subsets | Medium | 13.2% | TopicsArrayHash TableString |
| 2429. Minimize XOR | Medium | 13.2% | TopicsGreedyBit Manipulation |
| 1368. Minimum Cost to Make at Least One Valid Path in a Grid | Hard | 13.2% | TopicsArrayBreadth-First SearchGraph TheoryHeap (Priority Queue)MatrixShortest Path0-1 BFSDijkstra's Algorithm |
| 1856. Maximum Subarray Min-Product | Medium | 13.2% | TopicsArrayStackMonotonic StackPrefix SumCartesian Tree |
| 944. Delete Columns to Make Sorted | Easy | 13.2% | TopicsArrayStringLongest Increasing Subsequence |
| 2772. Apply Operations to Make All Array Elements Equal to Zero | Medium | 13.2% | TopicsArrayPrefix Sum |
| 3026. Maximum Good Subarray Sum | Medium | 13.2% | TopicsArrayHash TablePrefix Sum |
| 1031. Maximum Sum of Two Non-Overlapping Subarrays | Medium | 13.2% | TopicsArrayDynamic ProgrammingSliding Window |
| 1524. Number of Sub-arrays With Odd Sum | Medium | 13.2% | TopicsArrayMathDynamic ProgrammingPrefix Sum |
| 2523. Closest Prime Numbers in Range | Medium | 13.2% | TopicsMathNumber TheoryPrimality TestSieve TheoryPrime Number Sieve |
