Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1635 | Hopper Company Queries I | Hard | Database |
| 1636 | Sort Array by Increasing Frequency | Easy | ArrayHash TableSorting |
| 1637 | Widest Vertical Area Between Two Points Containing No Points | Easy | ArraySorting |
| 1638 | Count Substrings That Differ by One Character | Medium | Hash TableStringDynamic Programming |
| 1639 | Number of Ways to Form a Target String Given a Dictionary | Hard | ArrayStringDynamic Programming |
| 1640 | Check Array Formation Through Concatenation | Easy | ArrayHash Table |
| 1641 | Count Sorted Vowel Strings | Medium | MathDynamic ProgrammingCombinatorics |
| 1642 | Furthest Building You Can Reach | Medium | ArrayGreedyHeap (Priority Queue) |
| 1643 | Kth Smallest Instructions | Hard | ArrayMathDynamic Programming |
| 1644 | Lowest Common Ancestor of a Binary Tree II | Medium | TreeDepth-First SearchBinary Tree |
| 1645 | Hopper Company Queries II | Hard | Database |
| 1646 | Get Maximum in Generated Array | Easy | ArraySimulation |
| 1647 | Minimum Deletions to Make Character Frequencies Unique | Medium | Hash TableStringGreedy |
| 1648 | Sell Diminishing-Valued Colored Balls | Medium | ArrayMathBinary Search |
| 1649 | Create Sorted Array through Instructions | Hard | ArrayBinary SearchDivide and Conquer |
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