#include <iostream>
#include <array>

using namespace std;

using ll = long long;

constexpr ll hours_in_day = 24;
constexpr ll minutes_in_hour = 60;

constexpr ll getTime(ll day, ll hour, ll minute) {
	return (day * hours_in_day + hour - ((day == 29 && hour >= 3) || day > 29)) * minutes_in_hour + minute;
}

constexpr array<ll, 5> round_end = {
	getTime(25, 0, 0),
	getTime(26, 0, 0),
	getTime(27, 0, 0),
	getTime(28, 0, 0),
	getTime(30, 0, 0),
};

int main() {
	std::ios_base::sync_with_stdio(0);
	cin.tie(0);

	ll x, d, h, m;
	cin >> x >> d >> h >> m;
	cout << round_end[x - 1] - getTime(d, h, m);
}