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

typedef long long LL;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

	LL x, d, h, m;
	cin >> x >> d >> h >> m;

	LL time = -1;
	if (x == 1) {
		time = (24LL-d) * 24LL * 60LL;
		time += (23LL-h) * 60LL;
		time += (59LL-m);
	} else if (x == 2) {
		time = (25LL-d) * 24LL * 60LL;
		time += (23LL-h) * 60LL;
		time += (59LL-m);
	} else if (x == 3) {
		time = (26LL-d) * 24LL * 60LL;
		time += (23LL-h) * 60LL;
		time += (59LL-m);
	} else if (x == 4) {
		time = (27LL-d) * 24LL * 60LL;
		time += (23LL-h) * 60LL;
		time += (59LL-m);
	} else if (x == 5) {
		time = (29LL-d) * 24LL * 60LL;
		time += (23LL-h) * 60LL;
		time += (59LL-m);
		if (d != 29LL || h <= 2LL) {
			time -= 60LL;
		}
	}
	
	cout << time + 1LL << '\n';

	return 0;
}