第一题：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
public class Problem1 {
private static void solution(long week, long hour, long minute, long delta) {
long day = delta / (60 * 24);
long rest = delta % (60 * 24);
long minuteNow = hour * 60 + minute;
if (rest > minuteNow) {
day ++;
minuteNow += 24 * 60;
}
week -= (day % 7);
if (week <= 0) {
week += 7;
}
minuteNow -= rest;
System.out.println(week);
long newMin = minuteNow / 60;
String minOut = "" + newMin, secondOut = "" + (minuteNow % 60);
if (newMin < 10) {
minOut = ("0" + newMin);
}
if ((minuteNow % 60) < 10) {
secondOut = ("0" + (minuteNow % 60));
}
System.out.println(minOut + ":" + secondOut);
}
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String[] lines = new String[3];
for (int i = 0; i < 3; ++ i) {
lines[i] = reader.readLine();
}
int week = Integer.parseInt(lines[0].trim());
String time = lines[1].trim();
String[] strs = time.split(":");
long hour = Long.parseLong(strs[0].trim());
long minute = Long.parseLong(strs[1].trim());
long delta = Long.parseLong(lines[2]);
solution(week, hour, minute, delta);
}
}
