View Code of Problem 56

#include<stdio.h>
#include<math.h>
int main()
{
	int h,m,s;
	int hh,mm,ss,sum1,sum2,sum;
	scanf("%d:%d:%d\n",&h,&m,&s);
	scanf("%d:%d:%d",&hh,&mm,&ss);
	sum1=h*3600+m*60+s;
	sum2=hh*3600+mm*60+ss;
	sum=abs(sum1-sum2);
	printf("%02d:%02d:%02d",sum/3600,(sum%3600)/60,sum%60);
	return 0;
}