```cpp
#include<iostream>
using namespace std;
int main()
{
int a,b,c,d,e=0,f=0;
cin>>a>>b>>c>>d;
for(int i=1;i<=c-a;i++)
{
e=c-a;
f=d-b;
if(d-b<0)
{
e=e-1;
f=60-b+d;
}
}
cout<<e<<" "<<f;
return 0;
}
```
by 市场花园行动 @ 2017-10-05 07:39:27
```cpp
#include<iostream>
using namespace std;
int main()
{
int a,b,c,d,e,f,g,h,i;
cin>>a>>b>>c>>d;
e=60*a+b;
f=60*c+d;
g=f-e;
h=g/60;
i=g%60;
cout<<h<<" "<<i<<endl;
return 0;
}
```
by 刘英皓 @ 2017-10-05 16:33:00