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

typedef long long ll;
typedef short int sint;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<sint, sint> pss;
typedef vector<ll> vll;
typedef vector<int> vint;
typedef vector<sint> vsint;
typedef vector<char> vchar;
typedef vector<bool> vbool;
typedef vector<vbool> vvbool;
typedef vector<vll> vvll;
typedef vector<pll> vpll;
typedef vector<pii> vpii;
typedef vector<pss> vpss;
typedef vector<ull> vull;
typedef vector<vint> vvint;
typedef vector<vvint> vvvint;
typedef vector<vchar> vvchar;
typedef vector<vpii> vvpii;
typedef vector<vpll> vvpll;

#define rep(i, m, n) for (int i = (int)(m); i <= (int)(n); ++i)
#define res(i, m, n) for (int i = (int)(m); i >= (int)(n); --i)
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define all1(x) (x).begin()+1, (x).end()


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

    ll x, d, h, m;
    cin >> x >> d >> h >> m;
    if (x == 5 && (d < 29 || (d==29 && h < 3)))
        m += 60;

    d *= 24 * 60;
    h *= 60;
    m;
    m = d + h + m;

    if (x == 5)
        ++x;

    cout << (24 + x) * 24 * 60 - m << '\n';

    return 0;
}