# WA(?)

import sys
from decimal import Decimal, ROUND_HALF_UP
dec = Decimal
input = sys.stdin.readline
MOD = 998244353

def get_fib(n):
    r5 = dec(5) ** dec(0.5)
    d1, d2 = dec(1), dec(2)
    return (d1 / r5 * (((d1 + r5) / d2) ** n - ((d1 - r5) / d2) ** n)).quantize(dec('0'), ROUND_HALF_UP) % MOD


print(get_fib(dec(input())))