Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 256 | Count of Smaller Numbers After Self | Hard | ArrayBinary SearchDivide and Conquer |
| 257 | Count of Sub-Multisets With Bounded Sum | Hard | ArrayHash TableDynamic Programming |
| 258 | Count Pairs in Two Arrays | Medium | ArrayTwo PointersBinary Search |
| 259 | Count Pairs of Connectable Servers in a Weighted Tree Network | Medium | ArrayTreeDepth-First Search |
| 260 | Count Pairs Of Nodes | Hard | ArrayHash TableTwo Pointers |
| 261 | Count Pairs of Points With Distance k | Medium | ArrayHash TableBit Manipulation |
| 262 | Count Pairs Of Similar Strings | Easy | ArrayHash TableString |
| 263 | Count Pairs That Form a Complete Day I | Easy | ArrayHash TableCounting |
| 264 | Count Pairs That Form a Complete Day II | Medium | ArrayHash TableCounting |
| 265 | Count Pairs Whose Sum is Less than Target | Easy | ArrayTwo PointersBinary Search |
| 266 | Count Pairs With XOR in a Range | Hard | ArrayBit ManipulationTrie |
| 267 | Count Partitions with Even Sum Difference | Easy | ArrayMathPrefix Sum |
| 268 | Count Partitions With Max-Min Difference at Most K | Medium | ArrayDynamic ProgrammingQueue |
| 269 | Count Paths With the Given XOR Value | Medium | ArrayDynamic ProgrammingBit Manipulation |
| 270 | Count Positions on Street With Required Brightness | Medium | ArrayPrefix Sum |
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