View Code of Problem 56

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