fn main() {
    let t = getline().parse::<usize>().unwrap();

    for _ in 0..t {
        let n = getline().parse::<u64>().unwrap();
        
        let mut f: u64 = 1;
        while f < n + 1 {
            f *= 10;
        }
        let m = f - (n + 1);

        // 2 + 7 | 27
        // 10 + 89 |  1089

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

fn getline() -> String {
    let mut __ret = String::new();
    std::io::stdin().read_line(&mut __ret).ok();
    __ret.trim().to_string()
}