const MOD: usize = 998244353;

fn main() {
    let mut nxy = String::new();
    std::io::stdin().read_line(&mut nxy).ok();
    let nxy: Vec<usize> = nxy.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nxy[0];
    let x = nxy[1];
    let y = nxy[2];

    let (x, y) = (x.min(y), x.max(y));
    if x > 1 && y < n && y - x == 1 {
        println!("0");
        return;
    }
    let limit = y - x - if x > 1 { 1 } else { 0 } - if y < n { 1 } else { 0 };
    let mut dp = vec![0usize; limit+1];
    dp[0] = 1;
    for i in 0..limit {
        if i+1 <= limit {
            dp[i+1] += dp[i];
            dp[i+1] %= MOD;
        }
        if i+3 <= limit {
            dp[i+3] += dp[i];
            dp[i+3] %= MOD;
        }
    }
    println!("{}", dp[limit]);
}