use proconio::input;

fn main() {
    input! {
        n:usize,
        mut x:usize,
        mut y:usize,
    }

    if x > y {
        (x, y) = (y, x);
    }
    if x != 1 {
        x += 1;
    }
    if y != n {
        y -= 1;
    }

    const MOD: usize = 998244353;
    let m = 1 + y - x;
    if m == 0 {
        println!("0");
        return;
    }
    let mut dp = vec![0; m];
    dp[0] = 1;
    for i in 0..m {
        if i + 1 < m {
            dp[i + 1] += dp[i];
            dp[i + 1] %= MOD;
        }
        if i + 3 < m {
            dp[i + 3] += dp[i];
            dp[i + 3] %= MOD;
        }
    }

    let ans = dp[m - 1];
    println!("{}", ans)
}