Think in patterns.
Solve like it’s the interview.
hand-picked DSA problems in C#, Java, Python, C++ and JavaScript. Run your code, climb the leaderboard and keep your streak alive.
- 73problems
- 12core patterns
- 5languages
- 2 Lakh+learners trained
Bubble sort
ArraysO(n²)Running
Compare neighbours, swap when out of order.
Inorder traversal
TreesDFSO(n)
Visit order:
Breadth-first search
GraphsQueueO(V+E)
Level order:
Longest common subsequence
Dynamic ProgrammingO(mn)
dp[i][j] = best length for the first i and j characters.
Browse by pattern
Master the idea once, solve the whole family.
| # | Title | Acceptance | Difficulty |
|---|---|---|---|
| 51 | Maximum fruit gathering by birds Array | 50.00% | Easy |
| 52 | Sum of elements of smallest subarray greater than x Array | 50.00% | Easy |
| 53 | Equal Sum Subarrays Queue | 50.00% | Easy |
| 54 | Check for balanced Paranthesis Stack | 28.56% | Easy |
| 55 | Print Pattern Recursion | 56.39% | Easy |
| 56 | Floor in a Sorted Array Sorting Algorithms | 33.75% | Easy |
| 57 | Find Transition Point Array · Searching Algorithms | 37.90% | Easy |
| 58 | Pair Sum Closest to 0 Searching Algorithms | 19.61% | Easy |
| 59 | Bitonic Point Searching Algorithm | 58.67% | Easy |
| 60 | Intersection of Two Linked Lists Linked List | 35.30% | Easy |
| 61 | Reverse Words In A String String | 47.80% | Easy |
| 62 | Maximum Width of Binary Tree Tree | 50.00% | Easy |
| 63 | Search Insert Position Array · Sorting Algorithms | 48.03% | Easy |
| 64 | Winner of an election String · Hashing | 53.75% | Easy |
| 65 | You and your books Array · Dynamic Programming | 50.00% | Easy |
| 66 | Insertion Sort Sorting Algorithms | 66.61% | Easy |
| 67 | Shop in Candy Store Sorting Algorithms | 45.43% | Easy |
| 68 | Queue using Linked List Queue | 45.60% | Easy |
| 69 | Implement Stack using Linked List Stack | 53.98% | Easy |
| 70 | Reverse a Linked List Linked List | 78.10% | Easy |
| 71 | Find Kth Rotation Array · Stack · Searching Algorithm | 23.16% | Easy |
| 72 | Merge Sorted Arrays Array · Sorting Algorithms | 32.01% | Easy |
| 73 | Missing In Array Array · Searching Algorithms | 29.59% | Easy |
Practice that builds the habit
Three steps, repeated every day.
- 1
Pick a pattern
Start from an idea such as two pointers or BFS, then move through easy, medium and hard.
- 2
Code and run
Write in your language, run on sample cases and submit against every hidden test.
- 3
Climb the board
Every solve earns points. Keep a daily streak and see where you stand this month.
Want a plan, not just problems?
The DSA bootcamp adds structured lessons, live mentorship and mock interviews on top of this practice platform.
