Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2686 | Sum of Imbalance Numbers of All Subarrays | Hard | ArrayHash TableEnumeration |
| 2687 | Sum of k-Mirror Numbers | Hard | MathEnumeration |
| 2688 | Sum of K Subarrays With Length at Least M | Medium | ArrayDynamic ProgrammingPrefix Sum |
| 2689 | Sum of Largest Prime Substrings | Medium | Hash TableMathString |
| 2690 | Sum of Matrix After Queries | Medium | ArrayHash Table |
| 2691 | Sum of Mutated Array Closest to Target | Medium | ArrayBinary SearchSorting |
| 2692 | Sum of Number and Its Reverse | Medium | MathEnumeration |
| 2693 | Sum of Numbers With Units Digit K | Medium | MathDynamic ProgrammingGreedy |
| 2694 | Sum of Prefix Scores of Strings | Hard | ArrayStringTrie |
| 2695 | Sum of Remoteness of All Cells | Medium | ArrayHash TableDepth-First Search |
| 2696 | Sum of Root To Leaf Binary Numbers | Easy | TreeDepth-First SearchBinary Tree |
| 2697 | Sum of Scores of Built Strings | Hard | StringBinary SearchRolling Hash |
| 2698 | Sum Of Special Evenly-Spaced Elements In Array | Hard | ArrayDynamic Programming |
| 2699 | Sum of Square Numbers | Medium | MathTwo PointersBinary Search |
| 2700 | Sum of Squares of Special Elements | Easy | ArrayEnumeration |
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