from typing import Sequence
import numpy as np


def mat_mul(mat1: np.matrix, mat2: np.matrix, mod: int = None):
    ans = mat1 * mat2
    return ans if mod is None else ans % mod


def mat_pow(mat1: Sequence[Sequence[int]], n: int, mod: int = None) -> Sequence[Sequence[int]]:
    mat1 = np.matrix(mat1)
    ans = np.identity(len(mat1))
    while n > 0:
        if n & 1:
            ans = mat_mul(ans, mat1)
        mat1 = mat_mul(mat1, mat1)
        n >>= 1
    return ans


def main():
    N = int(input())
    MOD = 998244353
    fib_matrix = np.matrix([[1, 1], [1, 0]])
    init = np.array(([1, 0], )).T
    fib_matrix_pow = mat_pow(fib_matrix, N, MOD)
    fib_N = np.dot(fib_matrix_pow, init)
    print(int(fib_N[0, 0] - 1) % MOD)


if __name__ == "__main__":
    main()