Problem:
Score : 100 points

Problem Statement

Cat Snuke is learning to write characters.
Today, he practiced writing digits 1 and 9, but he did it the other way around.

You are given a three-digit integer n written by Snuke.
Print the integer obtained by replacing each digit 1 with 9 and each digit 9 with 1 in n.

Constraints

111 \leq n \leq 999

n is an integer consisting of digits 1 and 9.

Input

Input is given from Standard Input in the following format:

n

Output

Print the integer obtained by replacing each occurrence of 1 with 9 and each occurrence of 9 with 1 in n.

Sample Input 1

119

Sample Output 1

991

Replace the 9 in the ones place with 1, the 1 in the tens place with 9 and the 1 in the hundreds place with 9. The answer is 991.

Sample Input 2

999

Sample Output 2

111

Solution in Rust (1.15.1) (judge verdict: Accepted)

fn atcoder_beginner_contest_999() -> Result<String, &'static str> {
    let mut input = String::new();
    std::io::stdin().read_line(&mut input)
        .map_err(|_e| "input failed")?;

    Ok(
    // String -> char iterator
    input.trim_right()
        .chars()
        .map(|c| {
            if c == '9' {
                '1'
            }
            else {
                '9'
            }
        })
        .collect()
    )
}

fn main() {
    println!("{}", atcoder_beginner_contest_999().unwrap());
}