#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define all(x) x.begin(),x.end()
#define rep(i,a,b) for(int i=a;i<=b;i++)
#define each(a,x) for (auto& x: a)
const char nl = '\n';
int dp[200005];
void solve(){
    int n; cin >> n;
    int a,b,c; cin >> a >> b >> c;
    rep(i,3,n) {
        dp[i] = dp[i-1];
        if (i >= 3) dp[i] = max(dp[i], dp[i-3] + a);
        if (i >= 5) dp[i] = max(dp[i], dp[i-5] + b);
        if (i >= 10) dp[i] = max(dp[i], dp[i-10] + c);
    }
    cout << dp[n] << nl;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int t = 1;// cin >> t;
    while (t--){
        solve();
    }
}