const MOD: usize = 998244353;

fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();

    let maxcnt = n/3;
    let mut dp = vec![vec![vec![0usize; 3]; maxcnt+1]; n+1];
    dp[0][0][0] = 1;
    for i in 0..n {
        for j in 0..=maxcnt {
            for pat in 0..3 {
                if dp[i][j][pat] == 0 { continue; }
                for c in 0..26 {
                    let npat = pat + if (pat == 0 && c == 2) || (pat == 1 && c == 14) || (pat == 2 && c == 13) { 1 } else { 0 };
                    if npat < 3 {
                        dp[i+1][j][npat] += dp[i][j][pat];
                        dp[i+1][j][npat] %= MOD;
                    } else {
                        dp[i+1][j+1][0] += dp[i][j][pat];
                        dp[i+1][j+1][0] %= MOD;
                    }
                }
            }
        }
    }
    println!("{}", dp[n].iter().enumerate().map(|(i, v)| v.iter().sum::<usize>() % MOD * i % MOD).sum::<usize>() % MOD);
}