%02d
小乐乐定闹钟
http://www.nowcoder.com/questionTerminal/0f7e422e12be4a7f9958ca2a82abc775
import java.util.*;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
String[] s = sc.nextLine().split("[: ]");
int h = Integer.parseInt(s[0]), m = Integer.parseInt(s[1]), t = Integer.parseInt(s[2]);
m = m + t;
h = (h + m/60)%24;
m = m%60;
System.out.printf("%02d:%02d", h, m);
}
}
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