How AlgoArena Works

Name: AlgoArena
Rating: 4.8 (1000 reviews)
Author: AlgoArena

Experience the thrill of real-time competitive programming. Battle developers worldwide in 1v1 LeetCode-style challenges.

The Battle Process

From matchmaking to victory, here's how every coding battle unfolds.

1. Find Opponent

Our ELO-based matchmaking system pairs you with developers of similar skill level for fair competition.

2. Problem Selection

Both players receive the same LeetCode-style algorithm problem, ranging from arrays to dynamic programming.

3. Code & Compete

Race against time and your opponent. Write, test, and submit your solution in real-time with live progress tracking.

4. Victory & Growth

Win or lose, gain ELO points, climb the leaderboard, and improve your algorithmic thinking skills.

Real-Time Battle Interface

Experience the intensity of live coding with our purpose-built battle environment.

Live Code Editor

Write code in your preferred language with syntax highlighting, auto-completion, and real-time error detection.

Instant Testing

Run test cases instantly to validate your solution. See results in real-time as you code.

Progress Tracking

Monitor your opponent's progress with live indicators. Feel the pressure as they advance through test cases.

Victory Conditions

First to pass all test cases wins! Or compete for the most efficient solution with time and space complexity scoring.

Battle in Progress

You vs. CodeMaster15:00

// Two Sum Problem

function twoSum(nums, target) {

const map = new Map();

for (let i = 0; i < nums.length; i++) {

}

Test Cases: 3/5 ✓Opponent: 2/5 ✓

Battle Problem Types

Face diverse algorithmic challenges across all major computer science domains.

Arrays & Hashing

Two pointers, sliding window, prefix sums

120+ problemsEasy to Hard

Trees & Graphs

DFS, BFS, shortest paths, tree traversals

95+ problemsMedium to Hard

Dynamic Programming

Memoization, tabulation, optimization

75+ problemsMedium to Expert

Linked Lists

Reversal, cycle detection, merging

45+ problemsEasy to Medium

Binary Search

Search spaces, rotated arrays, peaks

35+ problemsMedium to Hard

Backtracking

Permutations, combinations, constraint solving

40+ problemsMedium to Hard

Ready to Battle?

Join our growing community of developers testing their skills in real-time coding battles. Your algorithmic journey starts here.

Start Your First Battle Practice Problems