View Code of Problem 56

#include<iostream>
#include<cmath>
using namespace std;

int main(){
	int hour1;
	int min1;
	int sec1;
	int hour2;
	int min2;
	int sec2;
	scanf("%d:%d:%d",&hour1,&min1,&sec1);
	scanf("%d:%d:%d",&hour2,&min2,&sec2);
	int sum1=hour1*3600+min1*60+sec1;
	int sum2=hour2*3600+min2*60+sec2;
	int res=(int)abs(sum1-sum2);
	printf("%d:%02d:%02d",res/3600,res/60%60,res%60); 
	return 0;
}