Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1350 | Students With Invalid Departments | Easy | Database |
| 1351 | Count Negative Numbers in a Sorted Matrix | Easy | ArrayBinary SearchMatrix |
| 1352 | Product of the Last K Numbers | Medium | ArrayMathDesign |
| 1353 | Maximum Number of Events That Can Be Attended | Medium | ArrayGreedySorting |
| 1354 | Construct Target Array With Multiple Sums | Hard | ArrayHeap (Priority Queue) |
| 1355 | Activity Participants | Medium | Database |
| 1356 | Sort Integers by The Number of 1 Bits | Easy | ArrayBit ManipulationSorting |
| 1357 | Apply Discount Every n Orders | Medium | ArrayHash TableDesign |
| 1358 | Number of Substrings Containing All Three Characters | Medium | Hash TableStringSliding Window |
| 1359 | Count All Valid Pickup and Delivery Options | Hard | MathDynamic ProgrammingCombinatorics |
| 1360 | Number of Days Between Two Dates | Easy | MathString |
| 1361 | Validate Binary Tree Nodes | Medium | TreeDepth-First SearchBreadth-First Search |
| 1362 | Closest Divisors | Medium | Math |
| 1363 | Largest Multiple of Three | Hard | ArrayMathDynamic Programming |
| 1364 | Number of Trusted Contacts of a Customer | Medium | Database |
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