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#include <bits/stdc++.h>

using namespace std;

int main()
{
    int x, d, h, m;
    cin>>x>>d>>h>>m;
    if(x == 1)
    {
        int time = (d*24 + h) * 60 + m;
        int deadline = (24*24 + 24) * 60;
        cout<<deadline - time<<endl;
    }
    if(x == 2)
    {
        int time = (d*24 + h) * 60 + m;
        int deadline = (25*24 + 24) * 60;
        cout<<deadline - time<<endl;
    }
    if(x == 3)
    {
        int time = (d*24 + h) * 60 + m;
        int deadline = (26*24 + 24) * 60;
        cout<<deadline - time<<endl;
    }
    if(x == 4)
    {
        int time = (d*24 + h) * 60 + m;
        int deadline = (27*24 + 24) * 60;
        cout<<deadline - time<<endl;
    }
    if(x == 5)
    {
        if(d < 29 || (d == 29 && h < 2))
        {
            int time = (d*24 + h) * 60 + m;
            int deadline = (29*24 + 23) * 60;
            cout<<deadline - time<<endl;
        }
        else
        {
            int time = (d*24 + h) * 60 + m;
            int deadline = (29*24 + 24) * 60;
            cout<<deadline - time<<endl;
        }
    }
}