use proconio::input;

fn dfs(digits: &Vec<u64>, i: usize, sum: u64, counter: u64) -> u64{
    if i < digits.len(){
        dfs(digits, i + 1, sum + counter, digits[i]) + dfs(digits, i + 1, sum, counter * 10 + digits[i])
    } else{
        sum + counter
    }
}

fn main() {
    input!{
        s: String,
    };

    let ns : Vec<u64> = s.chars().map(|c| u64::from(c.to_digit(10).unwrap())).collect();
    let result = dfs(&ns, 1, 0, ns[0]);

    println!("{}", {result});
}