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

    let result = (0..9).rev().map(|i| (i+1).to_string().repeat(cnts[i])).collect::<Vec<_>>().join("");
    println!("{}", result);
}