题解 | #小乐乐定闹钟#

import java.util.Scanner;

// 主要是去掉天数的影响
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        // 时刻
        String info = sc.nextLine();
        String time = info.substring(0, info.indexOf(" "));
        int minutes = Integer.valueOf( info.substring(info.indexOf(" ") + 1));
        // 分钟数
        int hour = Integer.valueOf(time.split(":")[0]);
        int minute = Integer.valueOf(time.split(":")[1]);
        // 不考虑天数
        hour = (hour + minutes / 60 % 24) % 24;
        minute = minute + minutes % 60;
        // 可能加上原有的分钟数后又会超过60
        if (minute >= 60) {
            minute = minute % 60;
            hour = hour + 1;
        }
        System.out.printf("%02d:%02d", hour, minute);
    }
}