typedef long long ll;
typedef long double ld;

#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    ll n;
    std::cin >> n;
    ll a,b,c;
    std::cin >> a>>b>>c;
    vector<ll> dp(n+1);
    ll ma = 0;
    for (int i = 1; i <= n; i++) {
        if(i-3>=0)dp[i] = max(dp[i],dp[i-3]+a);
        if(i-5>=0)dp[i] = max(dp[i],dp[i-5]+b);
        if(i-10>=0)dp[i] = max(dp[i],dp[i-10]+c);
        ma = max(ma, dp[i]);
    }
    std::cout << ma << std::endl;
}