e，没懂
```cpp
#include<iostream>
using namespace std;
int main(){
int a,b,c,d,e,f,s,z;
cin>>a>>b>>c>>d;
a<=24;
b<=60;
c<=24;
d<=60;
e<=24;
f<=60;
s=(a*60+b*1);
z=(c*60+d*1);
e=(z-s)/60;
f=(z-s)%60;
cout<<e<<" "<<f;
}
```
by laina_23 @ 2017-09-29 21:11:59