Welcome to Algotester!

• What is Algotester?

  1. Online judge with a lot of interesting problems of various difficulty.

  2. Platform for problem preparation.

  3. Platform for organizing ICPC and IOI styles contests.

  4. Platform for organizing optimization contests.

• Judge Verdict List

  Wrong Answer	There is a valid test case on which your solution result is different from the judge’s solution result.
  Runtime Error	The program ended unexpectedly (for example, there was an attempt to divide by 0, or to index outside the array).
  Time Limit	There is a valid test case in which the program execution time exceeds the limit specified in the statement.
  Memory Limit	There is a valid test case in which the program memory consumption exceeds the limit specified in the statement.
  Compilation Error	The compiler is unable to compile your code. To see compiler output, go to compiler tab in the solution view.
  Internal error	There is a judge error. Algotester team is trying to fix it.
  Idle Time Limit Exceeded	Interactor waited too long for user output. This error is occurred when interaction protocol is violated.
  Accepted	This is the only verdict that is good for you - the program passed all test cases and is accepted by the judge!

• Available Programming Languages

  Language	Version	Compiler Arguments
  C++	g++ 14.1.0	-O2 -std=c++23
  C	gcc 14.1.0	-O2 -std=gnu23
  C#	Mono C# compiler version 6.4.0.198	/o+ /r:System.Numerics.dll
  Java	openjdk 23
  Pascal	Free Pascal Compiler 3.2.2	-O2 -Sh
  Python	Python 3.8.1	-O
  PyPy	PyPy 7.3.0 with GCC 7.4.0	-O

• Examples of problem "A plus B" solutions written on available programming languages:

  • C++

    #include <iostream>
    using namespace std;
            
    int main()
    {
        int a, b;
        cin >> a >> b;
        
        cout << a + b << endl;
        
        return 0;
    }

  • C

    #include <stdio.h>
    
    int main()
    {
        int a, b;
        scanf("%d%d", &a, &b);
        printf("%d\n", a+b);
        return 0;
    }

  • C#

    using System;
    
    class Algotester
    {
        public static void Main(string[] args)
        {
            string[] line = Console.ReadLine().Split(' ');
            int a = Int32.Parse(line[0]);
            int b = Int32.Parse(line[1]);
    
            Console.WriteLine(a + b);
        }
    }

  • Java

    import java.util.Scanner;
    
    public class Algotester
    {
        public static void main(String[] args) 
        {
            Scanner in = new Scanner(System.in);
            int a = in.nextInt();
            int b = in.nextInt();
            
            System.out.println(a + b);
       }
    }

  • Pascal

    var a, b : integer;
    begin
        read(a, b);
    
        writeln(a + b);
    end.

  • Python / PyPy

    a, b = input().split()
    a, b = int(a), int(b)
    print(a+b)