Suuremmat

use std::io::{self, BufRead};

fn main() {
    let mut lines = io::BufReader::new(io::stdin()).lines();

    let t = lines.next().unwrap().unwrap().parse::<usize>().unwrap();

    for _ in 0..t {
        let n = lines.next().unwrap().unwrap();
        
        if n.bytes().all(|b| b == b'9') {
            for _ in 0..=n.len() {
                print!("1")
            }
            println!();
        }
        else {
            for _ in 0..=n.len() {
                print!("{}", n.bytes().next().unwrap() as char);
            }
            println!();
        }
    }
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER