Practice problems across 75+ categories
Practice problems frequently asked at Recursion • 50 problems | 11 Easy | 24 Medium | 15 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Finding 3-Digit Even Numbers | Easy | ArrayHash TableRecursion |
| 17 | Integer to English Words | Hard | MathStringRecursion |
| 18 | K-th Symbol in Grammar | Medium | MathBit ManipulationRecursion |
| 19 | Maximize Number of Nice Divisors | Hard | MathRecursionNumber Theory |
| 20 | Merge Two Sorted Lists | Easy | Linked ListRecursion |
| 21 | Minimum Non-Zero Product of the Array Elements | Medium | MathGreedyRecursion |
| 22 | Number of Digit One | Hard | MathDynamic ProgrammingRecursion |
| 23 | Output Contest Matches | Medium | StringRecursionSimulation |
| 24 | Palindrome Linked List | Easy | Linked ListTwo PointersStack |
| 25 | Parse Lisp Expression | Hard | Hash TableStringStack |
| 26 | Parsing A Boolean Expression | Hard | StringStackRecursion |
| 27 | Partition Array into Two Equal Product Subsets | Medium | ArrayBit ManipulationRecursion |
| 28 | Permutation Sequence | Hard | MathRecursion |
| 29 | Power of Four | Easy | MathBit ManipulationRecursion |
| 30 | Power of Three | Easy | MathRecursion |
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