题解 | #小乐乐定闹钟#

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String[] time = sc.nextLine().split("[: ]");
        int k = Integer.parseInt(time[2]);
        int hour = Integer.parseInt(time[0]) + (int) k / 60;
        int minute = Integer.parseInt(time[1]) + k % 60;
        hour = minute - 60 >= 0 ? hour + 1 : hour; //minute >= 60的时候，hour要加1；
        hour = hour - 24 >= 0 ? hour % 24 : hour;//hour >= 24的时候，取对应的hour
        minute = minute - 60 >= 0 ? minute- 60 : minute;//minute >= 60的时候,取对应的minute
        System.out.print((hour < 10 ? "0"+hour: hour) + ":" + (minute< 10 ? "0"+minute : minute));
    }
}