Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 376 | Concatenation of Array | Easy | ArraySimulation |
| 377 | Concatenation of Consecutive Binary Numbers | Medium | MathBit ManipulationSimulation |
| 378 | Confirmation Rate | Medium | Database |
| 379 | Confusing Number | Easy | Math |
| 380 | Confusing Number II | Hard | MathBacktracking |
| 381 | Connecting Cities With Minimum Cost | Medium | Union FindGraphHeap (Priority Queue) |
| 382 | Consecutive Available Seats | Easy | Database |
| 383 | Consecutive Characters | Easy | String |
| 384 | Consecutive Numbers | Medium | Database |
| 385 | Consecutive Numbers Sum | Hard | MathEnumeration |
| 386 | Consecutive Transactions with Increasing Amounts | Hard | Database |
| 387 | Constrained Subsequence Sum | Hard | ArrayDynamic ProgrammingQueue |
| 388 | Construct Binary Search Tree from Preorder Traversal | Medium | ArrayStackTree |
| 389 | Construct Binary Tree from Inorder and Postorder Traversal | Medium | ArrayHash TableDivide and Conquer |
| 390 | Construct Binary Tree from Preorder and Inorder Traversal | Medium | ArrayHash TableDivide and Conquer |
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