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//Solution by Mikołaj Kołek

#include "bits/stdc++.h"
#define intin *istream_iterator<int>(cin)

using namespace std;

struct EndTime {
	int day, hour, minute;	
};
unordered_map<int, EndTime> endTimes = {
	{ 1, { .day = 24, .hour = 23, .minute = 60 } },
	{ 2, { .day = 25, .hour = 23, .minute = 60 } },
	{ 3, { .day = 26, .hour = 23, .minute = 60 } },
	{ 4, { .day = 27, .hour = 23, .minute = 60 } },
	{ 5, { .day = 29, .hour = 23, .minute = 60 } }
};

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	int x = intin, d = intin, h = intin, m = intin, timeLeft = 0;
	
	auto endTime = endTimes[x];
	timeLeft += (endTime.day - d) * 24 * 60;
	timeLeft += (endTime.hour - h) * 60;
	timeLeft += (endTime.minute - m);
	
	if(x == 5 and (d < 29 or (d == 29 and (h < 2))))
		timeLeft -= 60;
	
	cout << timeLeft;
	
	return 0;
}