Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3151 | Sum of Mutated Array Closest to Target | Medium | ArrayBinary SearchSorting |
| 3152 | Sum of Nodes with Even-Valued Grandparent | Medium | TreeDepth-First SearchBreadth-First Search |
| 3153 | Sum of Number and Its Reverse | Medium | MathEnumeration |
| 3154 | Sum of Numbers With Units Digit K | Medium | MathDynamic ProgrammingGreedy |
| 3155 | Sum of Prefix Scores of Strings | Hard | ArrayStringTrie |
| 3156 | Sum of Remoteness of All Cells | Medium | ArrayHash TableDepth-First Search |
| 3157 | Sum of Root To Leaf Binary Numbers | Easy | TreeDepth-First SearchBinary Tree |
| 3158 | Sum of Scores of Built Strings | Hard | StringBinary SearchRolling Hash |
| 3159 | Sum Of Special Evenly-Spaced Elements In Array | Hard | ArrayDynamic Programming |
| 3160 | Sum of Square Numbers | Medium | MathTwo PointersBinary Search |
| 3161 | Sum of Squares of Special Elements | Easy | ArrayEnumeration |
| 3162 | Sum of Subarray Minimums | Medium | ArrayDynamic ProgrammingStack |
| 3163 | Sum of Subarray Ranges | Medium | ArrayStackMonotonic Stack |
| 3164 | Sum of Subsequence Widths | Hard | ArrayMathSorting |
| 3165 | Sum of Total Strength of Wizards | Hard | ArrayStackMonotonic Stack |
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