Everything you need to know about AlgoArena. From your first battle to mastering advanced algorithms.
Sign up with your email and choose a username.
Complete your profile and select your preferred languages.
Start with practice problems to familiarize yourself.
Join the queue and compete against other developers.
Our ELO system pairs you with opponents of similar skill level
Both players receive the same algorithm problem simultaneously
15-minute timer starts. Code your solution in real-time
Solutions are tested against hidden test cases for accuracy
Two pointers, sliding window, string manipulation
Traversal, reversal, cycle detection, merging
DFS, BFS, shortest paths, tree traversals
Memoization, tabulation, optimization problems
Binary search, merge sort, quick sort variations
Scalability, distributed systems, architecture
Currently, we support Python, JavaScript, Java, C++, Go, and many more (16+ languages). More are being added based on community demand.
Your ELO rating changes based on battle outcomes and opponent ratings. Winning against higher-rated opponents gives more points.
Yes! Use Practice Mode to solve problems at your own pace. This is perfect for learning new concepts or warming up before battles.
If you disconnect, you have 2 minutes to reconnect. Your code is automatically saved. If you don't reconnect, the battle is forfeited.
Join the all-in-one platform where developers sharpen skills, compete live, and build with AI.