import java.util.Scanner;
public class main
{
    public static void main(String[] args)
    {
        Scanner jk=new Scanner(System.in);
        int a=jk.nextInt();
        int b=jk.nextInt();
        System.out.println("40");
        if(n>2)
        {
            System.out.println("Invalid Input");
        }
    }
}