Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 646 | DI String Match | Easy | ArrayTwo PointersString |
| 647 | Diagonal Traverse | Medium | ArrayMatrixSimulation |
| 648 | Diameter of Binary Tree | Easy | TreeDepth-First SearchBinary Tree |
| 649 | Diameter of N-Ary Tree | Medium | TreeDepth-First Search |
| 650 | Dice Roll Simulation | Hard | ArrayDynamic Programming |
| 651 | Diet Plan Performance | Easy | ArraySliding Window |
| 652 | Difference Between Element Sum and Digit Sum of an Array | Easy | ArrayMath |
| 653 | Difference Between Maximum and Minimum Price Sum | Hard | ArrayDynamic ProgrammingTree |
| 654 | Difference Between Ones and Zeros in Row and Column | Medium | ArrayMatrixSimulation |
| 655 | Difference of Number of Distinct Values on Diagonals | Medium | ArrayHash TableMatrix |
| 656 | Differences Between Two Objects | Medium | JavaScript |
| 657 | Different Ways to Add Parentheses | Medium | MathStringDynamic Programming |
| 658 | Digit Count in Range | Hard | MathDynamic Programming |
| 659 | Digit Operations to Make Two Integers Equal | Medium | MathGraphHeap (Priority Queue) |
| 660 | Dinner Plate Stacks | Hard | Hash TableStackDesign |
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