题解 | #小乐乐定闹钟#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            String[] str=in.nextLine().split(" ");
            String[] s=str[0].split(":");
            int hour=Integer.parseInt(s[0]);
            int minute=Integer.parseInt(s[1]);
            int k=Integer.parseInt(str[1]);
            int addhour=k/60;
            int addminute=k%60;
            hour+=addhour;
            minute+=addminute;
            if(minute>60){
                minute=minute%60;
                hour++;
            }
            if(hour>23){
                hour=hour%24;
            }
            if(hour<10&&minute<10){
                System.out.println("0"+hour+":0"+minute);
            }else if(hour<10&&minute>10){
                 System.out.println("0"+hour+":"+minute);
            }else if(hour>10&&minute<10){
                System.out.println(hour+":0"+minute);
            }else if(hour>10&&minute>10){
                System.out.println(hour+":"+minute);
            }      
        }
        in.close();
    }
}