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#include <bits/stdc++.h>

using namespace std;

int getTime(int day, int hour, int minute)
{
    return 24*60*day + 60*hour + minute;
}

int getRemainingTime(int round, int day, int hour, int minute)
{
    int result = 0;
    int currentTime = getTime(day, hour, minute);

    switch (round)
    {
        case 1: result = getTime(25, 0, 0); break;
        case 2: result = getTime(26, 0, 0); break;
        case 3: result = getTime(27, 0, 0); break;
        case 4: result = getTime(28, 0, 0); break;
        case 5: result = getTime(30, 0, 0); break;
    }
    result -= currentTime;

    if (round == 5 && (day < 29 || day == 29 && hour < 2))
    {
        result -= 60;
    }

    return result;
}

int main()
{
    ios_base::sync_with_stdio(0);

    int x, d, h, m;
    cin >> x >> d >> h >> m;
    cout << getRemainingTime(x, d, h, m);
}