The interview changed.Did your prep?
Companies now hand you AI-written code and ask what's wrong with it. Practise exactly that, free.
Already allowing AI in interviews: Google · Meta · Canva · Shopify · Coinbase What changed →
Round 2 · AI-assisted coding1:00
AI assistant · Done. It returns the biggest number.
1def biggest(nums):2 best = 03 for x in nums:4 if x > best:5 best = x6 return best
Interviewer · Is it right? Prove it wrong with one input.
The clock starts when you do.
See it before you sign up.
- students practising
- 274students practising
- LeetCode problems solved
- 1,616LeetCode problems solved
- lessons finished
- 3,130lessons finished
Students, in theirown words.
5.0
3 verified students, with their real progress
Verified student
Best app for beginner who's thinking "From where should I start DSA ?" , must try. Well guided through series of topics and questions. Also many amazing features like duels, certification etc.
- Language courses
- Revision
- Code Detective
On the site
14 solved · 6-day streak · 1 lessons
Verified student
If you wanted to learn DSA and also prepare for Big company interview this is the best website you can do at and also wanted to learn new coding language you can also do that
- Bug Hunt
- Code Detective
On the site
15 solved · 7-day streak
Verified student
This website is a great platform for students who want to learn DSA, OOPs, and different programming languages in a fun and interesting way. Instead of just reading theory and memorizing concepts, students can learn by solving problems, playing coding games, and understanding concepts through interactive examples. What I really like is that it makes difficult topics like arrays, linked lists, sorting algorithms, classes, objects, inheritance, and polymorphism much easier to understand. It makes
- Duels
- LeetCode sync
- Visual walkthroughs
On the site
1 lessons
Start where you are.
print("hello")I've never codedLearn C++, Python, Java or JavaScript from your first line.Start here- 105 / 422I know the basics422 LeetCode problems in order. Solve there, it's ticked here.Start here
- bug found in 14sI'm interviewing soonFind bugs in AI-written code, alone or racing friends.Start here
422 problems. 20 topics. In order.
- 1Foundations
- 2Arrays, Strings & Hashing
- 3Two Pointers
- 4Sliding Window
- 5Stack & Monotonic Stack
- 6Binary Search
- 7Linked List
- 8Recursion & Backtracking
- 9Binary Trees
- 10Binary Search Trees
- 11Heaps / Priority Queue
- 12Tries
- 13Graphs (BFS, DFS, Grid)
- 14Advanced Graphs
- 15Greedy
- 16Intervals
- 17Dynamic Programming – 1D
- 18Dynamic Programming – 2D & Advanced
- 19Bit Manipulation
- 20Math & Geometry
“I built this for my juniors. Now anyone preparing for placements can use it, free.”