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/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int x,d,h,m;cin>>x>>d>>h>>m;
    int w=0;
    int ilm=d*24*60+h*60+m;
    if(x==1){
        w=36000-ilm;
    }
    if(x==2){
        w=37440-ilm;
    }
    if(x==3){
        w=38880-ilm;
    }
    if(x==4){
        w=40320-ilm;
    }
    if(x==5){
        if(d==29 and h>=3){
            w=43200-ilm;
        }
        else{
            w=43200-ilm-60;    
        }
    }
    cout<<w;
}