fn main() {
    let mut nl = String::new();
    std::io::stdin().read_line(&mut nl).ok();
    let nl: Vec<u64> = nl.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nl[0] / nl[1] + if nl[0] % nl[1] > 0 { 1 } else { 0 };

    println!("{}", (2 * n - 1) % 998244353);
}