use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let c: Vec<usize> =
		s.split_whitespace().flat_map(str::parse).rev().collect();
	c[..9].iter().enumerate().for_each(|(i, &x)| {
		for _ in 0..x {
			print!("{}", 9 - i)
		}
	});
}