fn main() {
    let mut input = String::with_capacity(1024);
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut input).unwrap();
    let mut tokens = input.split_whitespace();
    let n = tokens.next().unwrap().parse::<usize>().unwrap();
    let [a, b, c] = [
        tokens.next().unwrap().parse::<u64>().unwrap(),
        tokens.next().unwrap().parse::<u64>().unwrap(),
        tokens.next().unwrap().parse::<u64>().unwrap(),
    ];

    let mut dp = vec![0u64; n + 1];
    let mut result = 0;

    for i in 0..=n {
        match i {
            0..=2 => {}
            3..=4 => {
                result.chmax(dp[i - 3] + a);
            }
            5..=9 => {
                result.chmax(dp[i - 3] + a);
                result.chmax(dp[i - 5] + b);
            }
            _ => {
                result.chmax(dp[i - 3] + a);
                result.chmax(dp[i - 5] + b);
                result.chmax(dp[i - 10] + c);
            }
        }
        dp[i] = result;
    }

    println!("{}", result);
}

trait Change {
    fn chmax(&mut self, x: Self);
    fn chmin(&mut self, x: Self);
}
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) {
        if *self < x {
            *self = x;
        }
    }
    fn chmin(&mut self, x: T) {
        if *self > x {
            *self = x;
        }
    }
}