import java.time.*;
import java.time.temporal.ChronoUnit;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		LocalDateTime start = LocalDateTime.now();
		Period period = Period.parse("P1M");
		LocalDateTime end = start.plus(period);
		long milliseconds = start.until(end, ChronoUnit.MILLIS);
		System.out.println(milliseconds);
	}
}