View Code of Problem 56

#include<stdio.h>
#include<string.h>
#include<math.h>
int main()
{
	int h1,m1,s1;
	int h2,m2,s2;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	int t1=s1+m1*60+h1*60*60;
	int t2=s2+m2*60+h2*60*60;
	int cha=abs(t1-t2);
	int temp=cha;
	int h=temp/(60*60);
	temp=cha;
	int m=(temp-h*60*60)/60;
	temp=cha;
	int s=temp-h*60*60-m*60;
	printf("%d:%02d:%02d\n",h,m,s);
	return 0; 
}