// Problem: No.2386 Udon Coupon (Easy)No.2386 乌冬面优惠券 （简易）
// Contest: yukicoder
// URL: https://yukicoder.me/problems/no/2386
// Memory Limit: 512 MB
// Time Limit: 2000 ms
// 
// Powered by CP Editor (https://cpeditor.org)

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=2e5+10;
const int INF=0x3f3f3f3f;
const int mod=1e9+7;
ll ksm(ll n,ll p,int mod){
	int ans=1;
	while(p){
		if(p&1) ans=(ans*n)%mod;
		n=(n*n)%mod;p>>=1;
	}
	return ans;
}
ll inv(ll b,ll c=mod) {return ksm(b,c-2,c);}
class Num{
public:
	ll num;
	Num(ll x) {num=(x%mod+mod)%mod;}
	Num operator+(Num p) {return Num(num+p.num);}
	Num operator-(Num p) {return Num(num-p.num);}
	Num operator*(Num p) {return Num(num*p.num);}
	Num operator/(Num p) {return Num(num*inv(p.num));}
	Num operator=(Num p) {this->num=p.num;return *this;}
	friend ll get(Num p) {return p.num;}
};
void solve() {
	ll n,a,b,c;
	cin>>n>>a>>b>>c;
	ll mx=0;
	for(ll x=0;x<=n;x+=3) {
		ll res=x/3*a,m=n-x;
		ll t1=x/3,t2=0,t3=0;
		if(b*2>=c) {
			res+=(m/5)*b;
			t2+=(m/5);
			m%=5;
		}
		else {
			res+=(m/10)*c;
			t3+=m/10;
		    m%=10;
		}
		res+=(m/5)*b;
		t2+=m/5;
		m%=5;
		mx=max(mx,res);
	}
	cout<<mx<<endl;
}
int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int T=1;
    //cin>>T;
    while(T--) {
    	solve();
    }
    return 0;
}