#include<iostream>
#include<vector>

using namespace std;

int main( void )
{
    int N, A, B, C;
    cin >> N;
    cin >> A >> B >> C;
    
    vector<int> dp( N + 1, 0 );
    int tmp1 = 0, tmp2 = 0, tmp3 = 0;
    for( int i = 3; i <= N; i++ )
    {
        tmp1 = dp[i - 3] + A;
        if( i >= 5 ) tmp2 = dp[i - 5] + B;
        if( i >= 10 ) tmp3 = dp[i - 10] + C;
        dp[i] = max( tmp1, max( tmp2, tmp3 ) );
    }

    cout << dp[N] << endl;

    return 0;
}