View Code of Problem 56

#include<stdio.h>
int main()
{
	int h1,h2,m1,m2,s1,s2,h3,m3,s3;
	long long int t,t1,t2;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	t1=h1*3600+m1*60+s1;
	t2=h2*3600+m2*60+s2;
	t=t1-t2;
	if(t<0)
	{
		t=t*(-1);
	}
	h3=t/3600;
	m3=(t/60)%60;
	s3=t%60;
	printf("%d:%02d:%02d\n",h3,m3,s3);
	return 0;
}