| # | Title | Topics | Acceptance | Solution | Difficulty |
|---|---|---|---|---|---|
| 1 | Flood Fill | Recursion | 69.00% | Medium | |
| 2 | Number of Islands | Recursion | 66.00% | Medium | |
| 3 | Remove Consecutive Duplicates | Recursion | 60.00% | Easy | |
| 4 | Binary Tree Post Order Traversal | Tree Recursion Traversal Binary Tree | 79.59% | Easy | |
| 5 | Binary Tree Zigzag Level Order Traversal | Tree Recursion Traversal Binary Tree | 71.48% | Medium | |
| 6 | Binary Tree Level Order Traversal | Tree Recursion Traversal Binary Tree | 79.68% | Easy | |
| 7 | Binary Tree Inorder Traversal | Recursion Trees Traversal Binary Tree | 75.68% | Easy | |
| 8 | Binary Tree Preorder Traversal | Tree Recursion Binary Tree | 79.85% | Easy | |
| 9 | Search in a 2D Matrix | Recursion Binary Search | 86.00% | Medium | |
| 10 | Find Minimum In Rotated Sorted Array | Recursion | 89.00% | Medium | |
| 11 | Peak Element In Rotated Array | Recursion | 88.00% | Easy | |
| 12 | Generate All Subsequence | Recursion | 56.00% | Medium | |
| 13 | Check if Binary Tree is Balanced | Recursion | 77.00% | Medium | |
| 14 | Generate All Subsets | Recursion | 60.00% | Medium | |
| 15 | Count Nodes in Binary Tree | Recursion | 64.00% | Medium | |
| 16 | Letter Combinations of Phone Number | Recursion | 60.00% | Medium | |
| 17 | Tiling Problem | Recursion | 50.00% | Medium | |
| 18 | Permutation Without Duplicates | Recursion | 67.00% | Medium | |
| 19 | Combination Sum II | Recursion | 76.00% | Medium | |
| 20 | Target Sum Ways | Recursion | 64.00% | Hard | |
| 21 | Partition Equal Subset | Recursion | 77.00% | Easy | |
| 22 | Unique Path | Recursion | 56.00% | Hard | |
| 23 | Rat In A Maze | Recursion | 38.00% | Hard | |
| 24 | Permutation of an Array | Array Recursion | 68.00% | Medium | |
| 25 | Permutation of A String | String Recursion | 66.00% | Medium | |
| 26 | Subsets with Duplicates | Recursion | 74.00% | Medium | |
| 27 | Factorial of N | Recursion | 60.00% | Easy | |
| 28 | Count Ways To Reach Nth Stair | Recursion | 60.00% | Medium | |
| 29 | Friends Pairing Problem | Recursion | 50.00% | Medium | |
| 30 | Count Binary Strings | Recursion | 60.00% | Medium | |
| 31 | Fibonacci Series (Tree Recursion) | Recursion | 60.00% | Medium | |
| 32 | Check String Is Subsequence To Another | Recursion | 75.00% | Medium | |
| 33 | Convert String to Integer | Recursion | 60.00% | Medium | |
| 34 | Replace pi to 3.14 | Recursion | 75.00% | Easy | |
| 35 | Remove All Occurrence of A Character | Recursion | 75.00% | Easy | |
| 36 | Count Characters | Recursion | 85.00% | Easy | |
| 37 | Check Palindrome | Recursion | 90.00% | Easy | |
| 38 | Reverse A String | Recursion | 48.00% | Easy | |
| 39 | Product of All Array Elements | Recursion | 80.00% | Easy | |
| 40 | Sum of Array Elements | Recursion | 58.00% | Easy | |
| 41 | Reverse An Array | Recursion | 85.00% | Easy | |
| 42 | All Occurrence Of An Element | Recursion | 59.00% | Easy | |
| 43 | Last Occurrence Of An Element | Recursion | 65.00% | Easy | |
| 44 | First Occurrence Of An Element In An Array | Recursion | 75.00% | Easy | |
| 45 | Check Array is Sorted | Recursion | 80.00% | Basic | |
| 46 | Find Maximum / Minimum in Array | Recursion | 75.00% | Easy | |
| 47 | Print Array Elements | Recursion | 50.00% | Easy | |
| 48 | Fibonacci Series | Recursion | 85.00% | Easy | |
| 49 | Power of (a^b) | Recursion | 85.00% | Easy | |
| 50 | Combination Sum | Recursion | 75.00% | Medium |
Structured learning, live mentorship and an integrated coding platform to help you land top software engineering roles.
Loading today’s challenge…
LEAD-ACE: EdTech Platform
600+ Quick notes
900+ Hands-on labs
50+ Real-world projects
45+ Interview books
