View Code of Problem 56

#include<stdio.h>
#include<math.h>
int main(){
	int h1,m1,s1,sum1,h2,m2,s2,sum2;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	sum1=(h1*60+m1)*60+s1;
	sum2=(h2*60+m2)*60+s2;
	sum1=abs(sum1-sum2);
	printf("%d:%02d:%02d",sum1/3600,sum1/60%60,sum1%60);
	return 0;
}