Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2386 | Number of Different Integers in a String | Easy | Hash TableString |
| 2387 | Number of Different Subsequences GCDs | Hard | ArrayMathCounting |
| 2388 | Number of Digit One | Hard | MathDynamic ProgrammingRecursion |
| 2389 | Number of Distinct Averages | Easy | ArrayHash TableTwo Pointers |
| 2390 | Number of Distinct Islands | Unknown | Hash TableDepth-First SearchBreadth-First Search |
| 2391 | Number of Distinct Roll Sequences | Hard | Dynamic ProgrammingMemoization |
| 2392 | Number of Distinct Substrings in a String | Unknown | StringTrieRolling Hash |
| 2393 | Number of Divisible Substrings | Medium | Hash TableStringCounting |
| 2394 | Number of Divisible Triplet Sums | Medium | ArrayHash Table |
| 2395 | Number of Employees Who Met the Target | Easy | Array |
| 2396 | Number of Enclaves | Medium | ArrayDepth-First SearchBreadth-First Search |
| 2397 | Number of Equal Count Substrings | Medium | Hash TableStringSliding Window |
| 2398 | Number of Equal Numbers Blocks | Medium | ArrayBinary SearchInteractive |
| 2399 | Number of Equivalent Domino Pairs | Easy | ArrayHash TableCounting |
| 2400 | Number of Even and Odd Bits | Easy | Bit Manipulation |
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