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

using ll = long long;
using pii = pair<int, int>;
template <class T>
using V = vector<T>;
template <class T>
using VV = V<V<T>>;

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define rep(i, n) rep2(i, 0, n)
#define rep2(i, m, n) for (int i = m; i < (n); i++)
#define per(i, b) per2(i, 0, b)
#define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--)
#define ALL(c) (c).begin(), (c).end()

constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }

template <class T, class U>
void chmin(T& t, const U& u) {
    if (t > u) t = u;
}
template <class T, class U>
void chmax(T& t, const U& u) {
    if (t < u) t = u;
}

template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
    os << "(" << p.first << "," << p.second << ")";
    return os;
}

template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    os << "{";
    rep(i, v.size()) {
        if (i) os << ",";
        os << v[i];
    }
    os << "}";
    return os;
}

#ifdef LOCAL
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << " " << H;
    debug_out(T...);
}
#define debug(...) \
    cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif

#define FOR(i, c) for (typeof(c.begin()) i = c.begin(); i != c.end(); ++i)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define fst first
#define snd second

#define double long double
const double EPS = 1e-6, INF = 1. / 0.;

double simplexMethodPD(double c[], int n, double b[], int m, double A[]) {
    double T[m + 1][n + m + 1];
    memset(T, 0, sizeof(T));
    REP(j, m) {
        REP(i, n) T[j][i] = A[j * n + i];
        T[j][n + j] = 1;
        T[j][n + m] = b[j];
    }
    REP(i, n) T[m][i] = c[i];
    while (1) {
        int p = 0, q = 0;
        REP(i, n + m) if (T[m][i] <= T[m][p]) p = i;
        REP(j, m) if (T[j][n + m] <= T[q][n + m]) q = j;
        double t = min(T[m][p], T[q][n + m]);
        if (t >= -EPS) return -T[m][n + m];  // optimal

        if (t < T[q][n + m]) {  // tight on c -> primal update
            REP(j, m)
            if (T[j][p] >= EPS)
                if (T[j][p] * (T[q][n + m] - t) >= T[q][p] * (T[j][n + m] - t))
                    q = j;
            if (T[q][p] <= EPS) return INF;  // primal infeasible
        } else {                             // tight on b -> dual update
            REP(i, n + m + 1) T[q][i] *= -1;
            REP(i, n + m)
            if (T[q][i] >= EPS)
                if (T[q][i] * (T[m][p] - t) >= T[q][p] * (T[m][i] - t)) p = i;
            if (T[q][p] <= EPS) return -INF;  // dual infeasible
        }
        REP(i, m + n + 1) if (i != p) T[q][i] /= T[q][p];
        T[q][p] = 1;  // pivot(q,p)
        REP(j, m + 1) if (j != q) {
            double alpha = T[j][p];
            REP(i, n + m + 1) T[j][i] -= T[q][i] * alpha;
        }
    }
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    ll a, b, c, d, e;
    cin >> a >> b >> c >> d >> e;
    double A[25];
    rep(i, 5) rep(j, 5) {
        A[i * 5 + j] = 0.0;
        int w = i - j;
        if (w < 0) w += 5;
        if (w <= 2) A[i * 5 + j] = 1.0;
    }
    double B[5] = {a, b, c, d, e};
    double C[5] = {-1, -1, -1, -1, -1};
    auto res = simplexMethodPD(C, 5, B, 5, A);
    cout << ll(-res) << endl;
    return 0;
}