没有数据，自己看看对不对吧

#include <iostream>
using namespace std;

int main() {
    int a,b,c,d,n,m,start,end,res;
    cin >> a >> b >> c >> d;
    
    if(c < a) c += 24;
    start = a*60+b;
    end = c*60+d;
    res = end-start;
    n = res/60;
    m = res%60;
    
    cout << n << ' ' << m;
    
    return 0;
}