import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneOffset;

public class Main {
	public static void main(String[] args) {
		int year = 1970, month = 1, dayOfMonth = 1, hour = 8, minute = 0;
		LocalDateTime ldt = LocalDateTime.of(year, month, dayOfMonth, hour, minute);
		Instant instant = ldt.toInstant(ZoneOffset.UTC);
		System.out.println(instant.toEpochMilli());
	}
}