#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <map>
#include <set>
#include <queue>
#include <iomanip>
#include <cstring>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i,n) for (int i = 0; i < int(n);i++)

int main(){
  int n;
  ll a,b,c;
  cin >> n;
  cin >> a >> b >> c;
  vector<ll> dp(n+11);
  for (int i = 0; i < n;i++){
    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);
    dp[i+1] = max(dp[i+1],dp[i]);
  }
  cout << dp[n] << endl;

  return 0;
}