#![allow(non_snake_case, unused_imports, unused_must_use)]
use std::io::{self, prelude::*};
use std::str;

const MOD: usize = 998_244_353;

fn main() {
    let (stdin, stdout) = (io::stdin(), io::stdout());
    let mut scan = Scanner::new(stdin.lock());
    let mut out = io::BufWriter::new(stdout.lock());

    macro_rules! input {
        ($T: ty) => {
            scan.token::<$T>()
        };
        ($T: ty, $N: expr) => {
            (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
        };
    }

    let N = input!(usize);

    let mut c0 = 1;
    let mut c1 = 0;

    let d = |a: &Vec<Vec<usize>>, b: &Vec<Vec<usize>>| {
        let a11 = a[0][0];
        let a12 = a[0][1];
        let a21 = a[1][0];
        let a22 = a[1][1];
        let b11 = b[0][0];
        let b12 = b[0][1];
        let b21 = b[1][0];
        let b22 = b[1][1];

        return vec![
            vec![(a11 * b11 + a12 * b21) % MOD, (a11 * b12 + a12 * b22) % MOD],
            vec![(a21 * b11 + a22 * b12) % MOD, (a21 * b12 + a22 * b22) % MOD],
        ];
    };

    let mut A = vec![vec![1, 1], vec![1, 0]];

    let P = N - 1;
    let mut Q = vec![vec![1, 0], vec![0, 1]];

    for i in 0..61 {
        if (P >> i) & 1 == 1 {
            Q = d(&Q, &A);
        }

        A = d(&A, &A);
    }

    // for _ in 2..N {
    //     A = d(&A, &A_0);
    // }

    let mut cn0 = c0 * Q[0][0] + c1 * Q[0][1];
    cn0 %= MOD;
    let mut cn1 = c0 * Q[1][0] + c1 * Q[1][1];
    cn1 %= MOD;

    c0 = cn0;
    c1 = cn1;

    writeln!(out, "{}", c0 + c1 - 1);

    // for _ in 1..N {
    //     let cn0 = c0 + c1;
    //     let cn1 = c0;

    //     c0 = cn0 % MOD;
    //     c1 = cn1 % MOD;

    //     writeln!(out, "{} {} {}", c0, c1, c0 + c1 - 1);
    // }
}

struct Scanner<R> {
    reader: R,
    buf_str: Vec<u8>,
    buf_iter: str::SplitWhitespace<'static>,
}
impl<R: BufRead> Scanner<R> {
    fn new(reader: R) -> Self {
        Self {
            reader,
            buf_str: vec![],
            buf_iter: "".split_whitespace(),
        }
    }
    fn token<T: str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buf_iter.next() {
                return token.parse().ok().expect("Failed parse");
            }
            self.buf_str.clear();
            self.reader
                .read_until(b'\n', &mut self.buf_str)
                .expect("Failed read");
            self.buf_iter = unsafe {
                let slice = str::from_utf8_unchecked(&self.buf_str);
                std::mem::transmute(slice.split_whitespace())
            }
        }
    }
}