Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 905. Sort Array By Parity | Easy | 21.9% | TopicsArrayTwo PointersSorting |
| 934. Shortest Bridge | Medium | 21.9% | TopicsArrayDepth-First SearchBreadth-First SearchMatrix |
| 957. Prison Cells After N Days | Medium | 21.9% | TopicsArrayHash TableMathBit ManipulationFloyd's Cycle Finding Algorithm |
| 1000. Minimum Cost to Merge Stones | Hard | 21.9% | TopicsArrayDynamic ProgrammingPrefix Sum |
| Missing Element in Sorted Array | Medium | 21.9% | TopicsArrayBinary Search |
| 1160. Find Words That Can Be Formed by Characters | Easy | 21.9% | TopicsArrayHash TableStringCounting |
| 1080. Insufficient Nodes in Root to Leaf Paths | Medium | 21.9% | TopicsTreeDepth-First SearchBinary Tree |
| Game Play Analysis I | Easy | 21.9% | TopicsDatabase |
| 1106. Parsing A Boolean Expression | Hard | 21.9% | TopicsStringStackRecursion |
| 1259. Handshakes That Don't Cross | Hard | 21.9% | TopicsMathDynamic Programming |
| 1362. Closest Divisors | Medium | 21.9% | TopicsMathPrime Factorization |
| 1304. Find N Unique Integers Sum up to Zero | Easy | 21.9% | TopicsArrayMath |
| 1325. Delete Leaves With a Given Value | Medium | 21.9% | TopicsTreeDepth-First SearchBinary Tree |
| 1326. Minimum Number of Taps to Open to Water a Garden | Hard | 21.9% | TopicsArrayDynamic ProgrammingGreedy |
| 1392. Longest Happy Prefix | Hard | 21.9% | TopicsStringRolling HashString MatchingHash FunctionZ AlgorithmKnuth–Morris–Pratt Algorithm |
| 1404. Number of Steps to Reduce a Number in Binary Representation to One | Medium | 21.9% | TopicsStringBit ManipulationSimulation |
| 1408. String Matching in an Array | Easy | 21.9% | TopicsArrayStringString Matching |
| NPV Queries | Easy | 21.9% | TopicsDatabase |
| Sales by Day of the Week | Hard | 21.9% | TopicsDatabase |
| 1526. Minimum Number of Increments on Subarrays to Form a Target Array | Hard | 21.9% | TopicsArrayDynamic ProgrammingStackGreedyMonotonic Stack |
| Customer Order Frequency | Easy | 21.9% | TopicsDatabase |
| Find the Index of the Large Integer | Medium | 21.9% | TopicsArrayBinary SearchInteractive |
| 1572. Matrix Diagonal Sum | Easy | 21.9% | TopicsArrayMatrix |
| 1601. Maximum Number of Achievable Transfer Requests | Hard | 21.9% | TopicsArrayBacktrackingBit ManipulationEnumeration |
| 1652. Defuse the Bomb | Easy | 21.9% | TopicsArraySliding Window |
