public class Suma {

public static void main (String []args) throws IOException
{
BufferedReader in=new BufferedReader(new InputStreamReader (System.in));

int num;

System.out.println("¿1+1?");
num= Integer.valueOf(in.readLine().trim()).intValue();

if (num==2)
	{
		System.out.println("Correcto");
	}