View Code of Problem 56

#include<stdio.h>
main()
{
	int h1,m1,s1,h2,m2,s2;
	int sum1,sum2,sum;
	int h,m,s;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	sum1=h1*3600+m1*60+s1;
	sum2=h2*3600+m2*60+s2;
	if(sum1>=sum2)sum=sum1-sum2;
	else sum=sum2-sum1;
	h=sum/3600;
	sum=sum%3600;
	m=sum/60;
	s=sum%60;
	printf("%d:%02d:%02d\n",h,m,s);

	
}