#include <iostream>
#include <iomanip>
#include <stack>
#include <queue>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <deque>
#include <set>
#include <map>
#include <bitset>
#include <atcoder/all>
#define rep(i,n) for(int i = 0; i < n; i++)

using namespace std;
using namespace atcoder;
using ll = long long;

ll dp[200009];

int main() {
	ll n;
	cin >> n;
	
	ll a, b, c;
	cin >> a >> b >> c;

	for (int i = 1; i <= n; i++) {
		if (i >= 3) 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);
	}

	ll ans = 0;
	for (int i = 0; i <= n; i++) {
		ans = max(ans, dp[i]);
	}

	cout << ans << endl;
}