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#include <bits/stdc++.h>

using namespace std;

#define SCALAR(x) \
int x; \
cin >> x;

#define SCALAR_LONG(x) \
long long x; \
cin >> x;

#define VECTOR(v, n) \
vector<int> v(n); \
for (int i = 0; i < n; ++i) \
cin >> v[i];

#define PAIR_VECTOR(v, pair_class, n) \
vector<pair_class> v; \
for (int _ = 0; _ < n; ++_) { \
SCALAR(first);  \
SCALAR(second); \
v.push_back({first, second}); \
}

#define PRINT(expr) \
cout << expr << '\n';

#define PRINT_IF(condition) \
auto message = condition ? "Yes" : "No"; \
PRINT(message)

#define BOOST_IO() \
ios::sync_with_stdio(false); \
cin.tie(nullptr);

void solve();

int main() {
    BOOST_IO()
    solve();
}

void solve() {
    SCALAR(x)
    SCALAR(d)
    SCALAR(h)
    SCALAR(m)

    const auto START_DAY = 23;
    const auto END_DAY = 29;

    auto round_last_day = x == 5 ? END_DAY : START_DAY + x;

    const auto LAST_HOUR = 23;
    const auto LAST_MINUTE = 60;

    auto days = round_last_day - d;
    auto hours = LAST_HOUR - h;
    auto minutes = LAST_MINUTE - m;

    if (x == 5 and (d < END_DAY or h < 3)) {
        --hours;
    }

    constexpr int MINUTES_PER_HOUR = 60;
    constexpr int MINUTES_PER_DAY = 24 * MINUTES_PER_HOUR;

    auto total_minutes = minutes + hours * MINUTES_PER_HOUR
                         + days * MINUTES_PER_DAY;

    PRINT(total_minutes)
}