// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
#define rep(i,n) for (ll i = 0; i < (n); ++i)
using vl = vector<ll>;
using vvl = vector<vl>;
using P = pair<ll,ll>;
#define pb push_back
#define int long long
#define double long double
#define INF (ll) 3e18
// Ctrl + Shift + B コンパイル
// Ctrl + C 中断
// ./m 実行


signed main(){
  int n; cin >> n;
  int a, b, c;
  cin >> a >> b >> c;
  vl dp(n+100);
  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;
}