Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2860. Happy Students | Medium | 7.2% | TopicsArraySortingEnumeration |
| 2131. Longest Palindrome by Concatenating Two Letter Words | Medium | 7.2% | TopicsArrayHash TableStringGreedyCounting |
| 1582. Special Positions in a Binary Matrix | Easy | 7.2% | TopicsArrayMatrix |
| 956. Tallest Billboard | Hard | 7.2% | TopicsArrayDynamic ProgrammingMeet in the MiddleKnapsack Problem0-1 Knapsack |
| 1888. Minimum Number of Flips to Make the Binary String Alternating | Medium | 7.2% | TopicsStringDynamic ProgrammingSliding Window |
| 1932. Merge BSTs to Create Single BST | Hard | 7.2% | TopicsArrayHash TableTreeDepth-First SearchBinary Search TreeBinary Tree |
| 3130. Find All Possible Stable Binary Arrays II | Hard | 7.2% | TopicsDynamic ProgrammingPrefix Sum |
| 3600. Maximize Spanning Tree Stability with Upgrades | Hard | 7.2% | TopicsBinary SearchGreedyUnion-FindGraph TheoryMinimum Spanning Tree |
| 1622. Fancy Sequence | Hard | 7.2% | TopicsMathDesignSegment TreeNumber TheoryFermat's Little Theorem |
| 1878. Get Biggest Three Rhombus Sums in a Grid | Medium | 7.2% | TopicsArrayMathSortingHeap (Priority Queue)MatrixPrefix Sum |
| 1727. Largest Submatrix With Rearrangements | Medium | 7.2% | TopicsArrayGreedySortingMatrix |
| 3552. Grid Teleportation Traversal | Medium | 7.2% | TopicsArrayHash TableBreadth-First SearchMatrix |
| 855. Exam Room | Medium | 7.2% | TopicsDesignHeap (Priority Queue)Ordered Set |
| 877. Stone Game | Medium | 7.2% | TopicsArrayMathDynamic ProgrammingMinimaxGame TheoryZero-Sum Game |
| 3661. Maximum Walls Destroyed by Robots | Hard | 7.2% | TopicsArrayBinary SearchDynamic ProgrammingSorting |
| 3655. XOR After Range Multiplication Queries II | Hard | 7.2% | TopicsArrayDivide and ConquerPrefix Sum |
| 2344. Minimum Deletions to Make Array Divisible | Hard | 7.2% | TopicsArrayMathSortingHeap (Priority Queue)Number TheoryEuclidean AlgorithmGreatest Common Divisor |
| 917. Reverse Only Letters | Easy | 7.2% | TopicsTwo PointersString |
| 2463. Minimum Total Distance Traveled | Hard | 7.2% | TopicsArrayDynamic ProgrammingSorting |
| 2515. Shortest Distance to Target String in a Circular Array | Easy | 7.2% | TopicsArrayString |
| 1281. Subtract the Product and Sum of Digits of an Integer | Easy | 7.2% | TopicsMath |
| 2033. Minimum Operations to Make a Uni-Value Grid | Medium | 7.2% | TopicsArrayMathSortingMatrix |
| 3660. Jump Game IX | Medium | 7.2% | TopicsArrayDynamic Programming |
| 3629. Minimum Jumps to Reach End via Prime Teleportation | Medium | 7.2% | TopicsArrayHash TableMathBreadth-First SearchNumber Theory |
| 1494. Parallel Courses II | Hard | 7.2% | TopicsDynamic ProgrammingBit ManipulationGraph TheoryBitmaskDirected Acyclic Graph |
