View Code of Problem 56

#include<stdio.h>
#include<math.h>
int main()
{
	int h1,h2,m1,m2,s1,s2;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	int t1=3600*h1+60*m1+s1;
	int t2=3600*h2+60*m2+s2;
	int x=fabs(t1-t2);
	h1=x/3600;
	m1=x%3600/60;
	s1=x%3600%60;
	printf("%d:%02d:%d\n",h1,m1,s1); 
	return 0;
}