题解 | #小乐乐定闹钟#

#include<stdio.h>
int main()
{
	int h = 0; 
	int m = 0; 
	int k = 0;  
	scanf("%d:%d%d", &h, &m, &k);  
	h = (h + (m + k) / 60) % 24;  
	m = (m + k) % 60;   
	printf("%02d:%02d", h, m);  
	return 0; 
}