#include <bits/stdc++.h>
#include <atcoder/all>
 
#define elif else if
#define ll long long
#define vll vector<long long>
#define vec vector
#define embk emplace_back
#define rep(i, n) for (int i = 0; i < n; i++)
#define rep3(i, n, k) for (int i = k; i < n; i++)
#define all(a) a.begin(), a.end()
 
using namespace std;
using namespace atcoder;
const ll INF = 1LL << 60;
const ll mod = 1000000007;

int main() {
  ll n, a, b, c; cin >> n >> a >> b >> c;
  vll dp(n+20);  //dp[うどん札の枚数] = 割引額の最大

  rep(i, n) {
    dp[i+3] = max(dp[i+3], dp[i] + a);
    dp[i+5] = max(dp[i+5], dp[i] + b);
    dp[i+10] = max(dp[i+10], dp[i] + c);
  }

  cout << dp[n] << endl;

}