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

int main() {
	int N;
	long long A, B, C;
	cin >> N >> A >> B >> C;
	vector<long long> dp(N+1);
	for( int i = 1; i <= N; i++ ) {
		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] << endl;
}