/*
   A) 5
   B) 1000
   C) 5000
   D) None of the above
*/
public class Long {
	public static final long MICROS_PER_DAY = 24 * 60 * 60 * 1000 * 1000;
	public static final long MILLIS_PER_DAY = 24 * 60 * 60 * 1000;

	public static void main(String[] args) {
		System.out.println(MICROS_PER_DAY / MILLIS_PER_DAY);
	}
}