View Code of Problem 56

#include<iostream>
#include<string>
using namespace std;
int main(){
	int h1,h2,h,m1,m2,m,s1,s2,s;
	int sum;
	scanf("%d:%d:%d %d:%d:%d",&h1,&m1,&s1,&h2,&m2,&s2);
//	cout<<h1<<" " <<h2<<" "<<m1<<" "<<m2<<" "<<s1<<" "<<s2;
	sum=(h2-h1)*3600+(m2-m1)*60+(s2-s1);
	h=sum/3600;
	m=(sum-3600*h)/60;
	s=sum-3600*h-m*60;
	printf("%d:%02d:%2d",h,m,s);
//	cout<<h<<" "<<m<<" "<<s<<endl;
	
	
	return 0;
}