```cpp
#include<iostream>
using namespace std;
int main()
{
int a,b,c,d,e,f,T;
cin>>a>>b>>c>>d;
T=60-b+60*(c-a-1)+d;
f=T%60;
e=T/60;
cout<<e<<" "<<f;
return 0;
}/*QQ 2822907581*/
```
by SingleTicket @ 2016-11-16 21:34:29