use itertools::Itertools;
use proconio::input;

fn main() {
    input! {
        a: [usize; 4],
        p: [usize; 4],
        mut t: usize
    }
    
    let index = (0..4).sorted_by_key(|i| p[*i]).collect_vec();
    let mut ans = 0;
    for i in index {
        let c = t.min(a[i] * p[i]);
        ans += c / p[i];
        t -= c / p[i] * p[i];
    }
    
    println!("{}", ans);
}