/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Calendar;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		  Calendar calendar = Calendar.getInstance();
        calendar.set(1990, 1, 1);
        int i = calendar.get(Calendar.DAY_OF_WEEK);

        System.out.println(i);
	}
}