Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 1072. Flip Columns For Maximum Number of Equal Rows | Medium | 7.2% | TopicsArrayHash TableMatrix |
| 1898. Maximum Number of Removable Characters | Medium | 7.2% | TopicsArrayTwo PointersStringBinary Search |
| Zigzag Iterator | Medium | 7.2% | TopicsArrayDesignQueueIterator |
| 1713. Minimum Operations to Make a Subsequence | Hard | 7.2% | TopicsArrayHash TableBinary SearchGreedyLongest Increasing Subsequence |
| All People Report to the Given Manager | Medium | 7.2% | TopicsDatabase |
| 2466. Count Ways To Build Good Strings | Medium | 7.2% | TopicsDynamic Programming |
| 3429. Paint House IV | Medium | 7.2% | TopicsArrayDynamic Programming |
| 1800. Maximum Ascending Subarray Sum | Easy | 7.2% | TopicsArray |
| 1726. Tuple with Same Product | Medium | 7.2% | TopicsArrayHash TableCounting |
| 3160. Find the Number of Distinct Colors Among the Balls | Medium | 7.2% | TopicsArrayHash TableSimulation |
| 2034. Stock Price Fluctuation | Medium | 7.2% | TopicsHash TableDesignHeap (Priority Queue)Data StreamOrdered Set |
| 1036. Escape a Large Maze | Hard | 7.2% | TopicsArrayHash TableDepth-First SearchBreadth-First SearchBidirectional Search |
| 2492. Minimum Score of a Path Between Two Cities | Medium | 7.2% | TopicsDepth-First SearchBreadth-First SearchUnion-FindGraph Theory |
| 2493. Divide Nodes Into the Maximum Number of Groups | Hard | 7.2% | TopicsDepth-First SearchBreadth-First SearchUnion-FindGraph Theory |
| 1827. Minimum Operations to Make the Array Increasing | Easy | 7.2% | TopicsArrayGreedy |
| 1366. Rank Teams by Votes | Medium | 7.2% | TopicsArrayHash TableStringSortingCounting |
| 2379. Minimum Recolors to Get K Consecutive Black Blocks | Easy | 7.2% | TopicsStringSliding Window |
| 773. Sliding Puzzle | Hard | 7.2% | TopicsArrayDynamic ProgrammingBacktrackingBreadth-First SearchMemoizationMatrixHeuristic SearchBidirectional SearchA* Search |
| 589. N-ary Tree Preorder Traversal | Easy | 7.2% | TopicsStackTreeDepth-First Search |
| 2206. Divide Array Into Equal Pairs | Easy | 7.2% | TopicsArrayHash TableBit ManipulationCounting |
| 1136. Parallel Courses | Medium | 7.2% | TopicsGraph TheoryTopological SortDirected Acyclic Graph |
| Data Stream as Disjoint Intervals | Hard | 7.2% | TopicsHash TableBinary SearchUnion-FindDesignData StreamOrdered Set |
| 1439. Find the Kth Smallest Sum of a Matrix With Sorted Rows | Hard | 7.2% | TopicsArrayBinary SearchHeap (Priority Queue)Matrix |
| 3394. Check if Grid can be Cut into Sections | Medium | 7.2% | TopicsArraySorting |
| 3306. Count of Substrings Containing Every Vowel and K Consonants II | Medium | 7.2% | TopicsHash TableStringSliding Window |
