import sys
input = sys.stdin.readline
def read_values(): return tuple(map(int, input().split()))
def read_list(): return list(read_values())

def main():      
    mod = 998244353
    n = int(input())
    f = [1] * (n+1)
    rf = [1] * (n+1)
    for i in range(n):
        f[i+1] = f[i]*(i+1)%mod
        rf[i+1] = pow(f[i+1],-1,mod)
    ans = 0
    for s in range(1,n//2+1):
        add = f[n] * rf[n-s*2] * rf[s] * rf[s] * rf[2] % mod
        ans += add
        ans %= mod
    print(ans)

if __name__ == "__main__":
    main()