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#include <iostream>

using namespace std;

int main(){

int x, d, h, m;
cin >> x >> d >> h >> m;

if(x==1){
    cout << -(d*24*60+h*60+m)+(25*24*60);
}

if(x==2){
    cout << -(d*24*60+h*60+m)+(26*24*60);
}

if(x==3){
    cout << -(d*24*60+h*60+m)+(27*24*60);
}

if(x==4){
    cout << -(d*24*60+h*60+m)+(28*24*60);
}

if(x==5){
    if((d*24*60+h*60+m)<=29*24*60+120){
        cout << -(d*24*60+h*60+m)+(30*24*60)-60;
    }
    else{
        cout << -(d*24*60+h*60+m)+(30*24*60);
    }
}


return 0;
}