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#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define YES cout << "YES\n"
#define NO cout << "NO\n"
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef long double ld;

#ifdef LOCAL
#define DTP(x, y)                                    \
    auto operator<<(auto &o, auto a)->decltype(y, o) \
    {                                                \
        o << "(";                                    \
        x;                                           \
        return o << ")";                             \
    }
DTP(o << a.first << ", " << a.second, a.second);
DTP(for (auto i : a) o << i << ", ", all(a));
void dump(auto... x) { ((cerr << x << ", "), ...) << '\n'; }
#define debug(x...) cerr << setw(4) << __LINE__ << ":[" #x "]: ", dump(x)
#else
#define debug(...) 42
#endif

const vi V{23, 24, 25, 26, 27};
const vi U{24, 25, 26, 27, 29};

void solve()
{
    int x, y, z, w;
    cin >> x >> y >> z >> w;
    int ans = 0;
    while (y != U[x - 1] + 1)
    {
        if (y == 29 && z == 2 && w == 0)
        {
            z = 3;
        }
        w++;
        if (w == 60)
        {
            w = 0;
            z++;
        }
        if (z == 24)
        {
            z = 0;
            y++;
        }
        ans++;
    }
    cout << ans << endl;
}

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    cin.exceptions(cin.failbit);

    int Z = 1;
    // cin >> Z;
    while (Z--)
        solve();
}