#include <iostream>
#include <vector>

#define rep(i, n) for (int i = 0; i < (n); ++i)
typedef long long ll;
using namespace std;

int main(int, char const *[])
{
  int n, a,b,c;
  int ans = 0;
  cin >> n >> a >> b >> c;
  vector<int> dp(n+1,0);
  rep(i,n+1){
    if(i>=3)dp[i]=max(dp[i-3]+a,dp[i]);
    if(i>=5)dp[i]=max(dp[i-5]+b,dp[i]);
    if(i>=10)dp[i]=max(dp[i-10]+c,dp[i]);
  }
  ans = dp[n];
  cout << ans << endl;
  return 0;
}

// vim: set ts=2 sw=2 sts=2: