Experience the thrill of real-time competitive programming. Battle developers worldwide in 1v1 coding duels, speedrun puzzles, and climb the global leaderboard.
From matchmaking to victory, here is how every coding battle unfolds.
Our ELO-based matchmaking system pairs you with developers of similar skill level for fair competition.
Both players receive the same algorithm problem, ranging from arrays to dynamic programming.
Race against time and your opponent. Write, test, and submit your solution in real-time with live progress tracking.
Win or lose, gain ELO points, climb the leaderboard, and sharpen your algorithmic thinking.
Experience the intensity of live coding with our purpose-built battle environment.
The same editor that powers VS Code. Full IntelliSense, syntax highlighting, and 16+ language support.
Run test cases instantly to validate your solution. See results in real-time as you code.
Monitor your opponent's progress with live indicators. Feel the pressure as they advance through test cases.
First to pass all test cases wins. Or compete for the most efficient solution with time and space complexity scoring.
Face diverse algorithmic challenges across all major computer science domains.
Two pointers, sliding window, prefix sums
DFS, BFS, shortest paths, tree traversals
Memoization, tabulation, optimization
Reversal, cycle detection, merging
Search spaces, rotated arrays, peaks
Permutations, combinations, constraints
Your algorithmic journey starts here. Join developers worldwide testing their skills in real-time.