use proconio::input;

fn main() {
    input! {
        a: [usize; 4],
        p: [usize; 4],
        mut t: usize
    }
    
    let mut index = (0..4).collect::<Vec<usize>>();
    index.sort_by_key( |&i| p[i]);
    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);
}