import java.time.Duration;

public class Main {
	public static void main(String[] args) {
		System.out.println(durationToMillis("10:00"));
	}

	static long durationToMillis(String strDuration) {
		String[] arr = strDuration.split(":");
		Duration duration = Duration.ZERO;
		if (arr.length == 2) {
			strDuration = "PT" + arr[0] + "M" + arr[1] + "S";
			duration = Duration.parse(strDuration);
		}
		return duration.toMillis();
	}
}