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#include <iostream>

using namespace std;
int x,d,h,m,m1;
int main()
{
    cin>>x>>d>>h>>m;
    if(x==1)
    {
        if(d!=24)
        {
            m1=(24-h)*60-m;
            m1+=24*60;
        }
        else
        {
            m1=(24-h)*60-m;
        }
        cout<<m1;
    }
    if(x==2)
    {
        if(d!=25)
        {
            m1=(24-h)*60-m;
            m1+=24*60;
        }
        else
        {
            m1=(24-h)*60-m;
        }
        cout<<m1;
    }
    if(x==3)
    {
        if(d!=26)
        {
            m1=(24-h)*60-m;
            m1+=24*60;
        }
        else
        {
            m1=(24-h)*60-m;
        }
        cout<<m1;
    }
    if(x==4)
    {
        if(d!=27)
        {
            m1=(24-h)*60-m;
            m1+=24*60;
        }
        else
        {
            m1=(24-h)*60-m;
        }
        cout<<m1;
    }
    if(x==5)
    {
        if(d==28)
        {
            m1=(24-h)*60-m;
            m1+=24*60;
        }
        if(d==29)
        {
            m1=(24-h)*60-m;
        }
        if(d==27)
        {
            m1=(24-h)*60-m;
            m1+=2*24*60;
        }
        if(d==29&&h>2)
        {
            cout<<m1;
        }
        else cout<<m1-60;
    }

    return 0;
}