View Code of Problem 56

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