fn input_num() -> usize {
    let mut line: String = String::new();
    std::io::stdin().read_line(&mut line).unwrap();
    line.trim().parse().unwrap()
}

fn input_chars() -> Vec<char> {
    let mut line: String = String::new();
    std::io::stdin().read_line(&mut line).unwrap();
    line.trim().chars().collect()
}

fn input_nums() -> (usize, usize, usize) {
    let mut line: String = String::new();
    std::io::stdin().read_line(&mut line).unwrap();
    let mut iter = line.split_whitespace();
    (
        iter.next().unwrap().parse().unwrap(),
        iter.next().unwrap().parse().unwrap(),
        iter.next().unwrap().parse().unwrap()
    )
}

fn input_vec_nums() -> Vec<usize> {
    let mut line: String = String::new();
    std::io::stdin().read_line(&mut line).unwrap();
    line.split_whitespace()
        .map(|x| x.parse().unwrap())
        .collect()
}

fn main() {
    let mut s = input_chars();
    let n = s.len();
    for i in 0..n {
        print!("{}{}", if i == n-1 {if s[i] == '1' {'0'} else {'1'}} else {s[i]}, if i == n-1 {"\n"} else {""});
    }
}