View Code of Problem 56

#include<stdio.h>
#include<math.h>
#include<string.h>
#include<stdlib.h>
int main()
{
	int h1,h2,m1,m2,s1,s2;
	scanf("%d:%d:%d%d:%d:%d",&h1,&m1,&s1,&h2,&m2,&s2);
	int t1,t2;
	t1=h1*3600+m1*60+s1;
	t2=h2*3600+m2*60+s2;
	int t;
	t=t1-t2;
	if(t<0)
	t=-1*t;
	int h,m,s;
	h=t/3600;
	t=t-h*3600;
	m=t/60;
	s=t-m*60;
	printf("%d:%02d:%02d\n",h,m,s);
	return 0;
}