Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 421 | Count of Matches in Tournament | Easy | MathSimulation |
| 422 | Count of Range Sum | Hard | ArrayBinary SearchDivide and Conquer |
| 423 | Count of Smaller Numbers After Self | Hard | ArrayBinary SearchDivide and Conquer |
| 424 | Count of Sub-Multisets With Bounded Sum | Hard | ArrayHash TableDynamic Programming |
| 425 | Count of Substrings Containing Every Vowel and K Consonants I | Medium | Hash TableStringSliding Window |
| 426 | Count of Substrings Containing Every Vowel and K Consonants II | Medium | Hash TableStringSliding Window |
| 427 | Count Pairs in Two Arrays | Medium | ArrayTwo PointersBinary Search |
| 428 | Count Pairs of Connectable Servers in a Weighted Tree Network | Medium | ArrayTreeDepth-First Search |
| 429 | Count Pairs of Equal Substrings With Minimum Difference | Medium | Hash TableStringGreedy |
| 430 | Count Pairs Of Nodes | Hard | ArrayHash TableTwo Pointers |
| 431 | Count Pairs of Points With Distance k | Medium | ArrayHash TableBit Manipulation |
| 432 | Count Pairs Of Similar Strings | Easy | ArrayHash TableString |
| 433 | Count Pairs That Form a Complete Day I | Easy | ArrayHash TableCounting |
| 434 | Count Pairs That Form a Complete Day II | Medium | ArrayHash TableCounting |
| 435 | Count Pairs Whose Sum is Less than Target | Easy | ArrayTwo PointersBinary Search |
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