Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2776 | Repeated Substring Pattern | Easy | StringString Matching |
| 2777 | Replace All Digits with Characters | Easy | String |
| 2778 | Replace All ?'s to Avoid Consecutive Repeating Characters | Easy | String |
| 2779 | Replace Elements in an Array | Medium | ArrayHash TableSimulation |
| 2780 | Replace Elements with Greatest Element on Right Side | Easy | Array |
| 2781 | Replace Employee ID With The Unique Identifier | Easy | Database |
| 2782 | Replace Non-Coprime Numbers in Array | Hard | ArrayMathStack |
| 2783 | Replace Question Marks in String to Minimize Its Value | Medium | Hash TableStringGreedy |
| 2784 | Replace the Substring for Balanced String | Medium | StringSliding Window |
| 2785 | Report Contiguous Dates | Hard | Database |
| 2786 | Report Spam Message | Medium | ArrayHash TableString |
| 2787 | Reported Posts | Easy | Database |
| 2788 | Reshape Data: Concatenate | Easy | Database |
| 2789 | Reshape Data: Pivot | Easy | Database |
| 2790 | Reshape the Matrix | Easy | ArrayMatrixSimulation |
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