#include <bits/stdc++.h>

#include <variant>

#define rep2(i, k, n) for (i64 i = (i64)(k); i < (i64)(n); i++)
#define rep(i, n) rep2(i, 0, n)
#define all(x) begin(x), end(x)
#ifdef ENV_LOCAL
#define dump \
  if (1) cerr
#else
#define dump \
  if (0) cerr
#endif

using namespace std;
using namespace std::string_literals;

using i32 = int32_t;
using i64 = int64_t;
using f64 = double;
using f80 = long double;
using vi32 = vector<i32>;
using vi64 = vector<i64>;

// using namespace harudake;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  i64 n;
  cin >> n;
  vi64 v(3);
  rep(i, 3) cin >> v[i];
  vi64 dp(n + 1);
  vi64 need = {3, 5, 10};
  rep(i, 3) {
    rep(j, n + 1) {
      if (j + need[i] > n) break;
      dp[j + need[i]] = max(dp[j + need[i]], dp[j] + v[i]);
    }
  }
  cout << dp[n] << endl;
  return 0;
}