use std::collections::VecDeque;


fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let mut a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    a.sort();
    if n == 1 {
        println!("{}", a[0]);
        return;
    } else if n % 2 == 1 {
        println!("1");
        return;
    }
    let l = a[0];
    let r = a[1];
    let mut a = a.into_iter().skip(2).collect::<Vec<usize>>();
    a.push(l*r);
    a.sort();
    let mut a = a.into_iter().collect::<VecDeque<usize>>();
    let mut bob = true;
    while a.len() > 1 {
        if bob {
            a.pop_back();
            a.pop_back();
            a.push_front(1);
        } else {
            let l = a.pop_front().unwrap();
            let r = a.pop_front().unwrap();
            a.push_front(l*r);
        }
        bob = !bob;
    }
    println!("{}", a[0]);
}