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


int main(){

    ios::sync_with_stdio(0);
    cin.tie(0);

    int x,d,h,m;
    cin>>x>>d>>h>>m;
    int d2=d-23;
    int dc=d2*24*60+h*60+m;

    vector<int>run={0,(2*24)*60,(3*24)*60,(4*24)*60,(5*24)*60,(7*24)*60};
    if(x==5 && ((d==29 && h<=2)||d<29)) dc+=60;
    cout<<run[x]-dc<<endl;;


}