Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 436 | Copy List with Random Pointer | Medium | Hash TableLinked List |
| 437 | Corporate Flight Bookings | Medium | ArrayPrefix Sum |
| 438 | Correct a Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 439 | Count All Possible Routes | Hard | ArrayDynamic ProgrammingMemoization |
| 440 | Count All Valid Pickup and Delivery Options | Hard | MathDynamic ProgrammingCombinatorics |
| 441 | Count Almost Equal Pairs I | Medium | ArrayHash TableSorting |
| 442 | Count Almost Equal Pairs II | Hard | ArrayHash TableSorting |
| 443 | Count Alternating Subarrays | Medium | ArrayMath |
| 444 | Count Anagrams | Hard | Hash TableMathString |
| 445 | Count and Say | Medium | String |
| 446 | Count Apples and Oranges | Medium | Database |
| 447 | Count Array Pairs Divisible by K | Hard | ArrayMathNumber Theory |
| 448 | Count Artifacts That Can Be Extracted | Medium | ArrayHash TableSimulation |
| 449 | Count Artist Occurrences On Spotify Ranking List | Easy | Database |
| 450 | Count Asterisks | Easy | String |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
