using A=System.Console;

public class Program

{

    static bool Prime(int n)

    {

        bool output=false;

        int i;

        for(i=2;i<n;i++)

        {

            if(n%i==0)

                return output;

        }

        output=true;

        return output;

    }

    public static void Main()

    {

        A.WriteLine(Prime(1));

    }

}

​