Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Maximum Swap | Medium | 20.1% | TopicsMathGreedy |
| Find K-th Smallest Pair Distance | Hard | 20.1% | TopicsArrayTwo PointersBinary SearchSorting |
| Number of Atoms | Hard | 20.1% | TopicsHash TableStringStackSorting |
| Closest Leaf in a Binary Tree | Medium | 20.1% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Serialize and Deserialize N-ary Tree | Hard | 20.1% | TopicsStringTreeDepth-First SearchBreadth-First Search |
| 762. Prime Number of Set Bits in Binary Representation | Easy | 20.1% | TopicsMathBit ManipulationPrimality Test |
| Search in a Binary Search Tree | Easy | 20.1% | TopicsTreeBinary Search TreeBinary Tree |
| Basic Calculator III | Hard | 20.1% | TopicsMathStringStackRecursion |
| 775. Global and Local Inversions | Medium | 20.1% | TopicsArrayMath |
| 776. Split BST | Medium | 20.1% | TopicsTreeBinary Search TreeRecursionBinary Tree |
| 779. K-th Symbol in Grammar | Medium | 20.1% | TopicsMathBit ManipulationRecursion |
| 801. Minimum Swaps To Make Sequences Increasing | Hard | 20.1% | TopicsArrayDynamic Programming |
| Design Linked List | Medium | 20.1% | TopicsLinked ListDesign |
| 836. Rectangle Overlap | Easy | 20.1% | TopicsMathGeometry |
| 869. Reordered Power of 2 | Medium | 20.1% | TopicsHash TableMathSortingCountingEnumeration |
| 878. Nth Magical Number | Hard | 20.1% | TopicsMathBinary SearchLeast Common MultipleInclusion-Exclusion Principle |
| 902. Numbers At Most N Given Digit Set | Hard | 20.1% | TopicsArrayMathStringBinary SearchDynamic Programming |
| Longest Repeating Substring | Medium | 20.1% | TopicsStringBinary SearchDynamic ProgrammingRolling HashSuffix ArrayHash FunctionSuffix AutomatonSuffix Tree |
| 1067. Digit Count in Range | Hard | 20.1% | TopicsMathDynamic Programming |
| 1065. Index Pairs of a String | Easy | 20.1% | TopicsArrayStringTrieSortingAho–Corasick Algorithm |
| 1085. Sum of Digits in the Minimum Number | Easy | 20.1% | TopicsArrayMath |
| 1100. Find K-Length Substrings With No Repeated Characters | Medium | 20.1% | TopicsHash TableStringSliding Window |
| 1025. Divisor Game | Easy | 20.1% | TopicsMathDynamic ProgrammingBrainteaserGame TheoryImpartial Game |
| 1118. Number of Days in a Month | Easy | 20.1% | TopicsMath |
| 1119. Remove Vowels from a String | Easy | 20.1% | TopicsString |
