using System;

public class Program

{

    static bool isPrime(int x) {

        // bool is a boolean type that has value of true/false

        // please implement this method

        int i;

        for (i=2;i<x;i++){

            if(x%i==0){

                return false;

            }

        }

        return true;

    }

    public static void Main()

    {

        int x = 11;

        isPrime(x);

        Console.WriteLine("{0}",isPrime(x));

        // please implement this program        

    }

}