```cpp
#include <iostream>
#include<cmath>
using namespace std;
int main()
{
int a,b,c,d;
int s1,s2,x,f;
cin>>a>>b>>c>>d;
s1=a*60+b;
s2=c*60+d;
f=(s2-s1)%60;
x=(s2-s1)/60;
cout<<x<<" "<<f<<endl;
return 0;
}
```
by 喔哈哈哈 @ 2017-01-08 15:50:43