import sys
input = sys.stdin.readline
P = int(input())
inverse = [0, 1]
fact = [1, 1]
fact_inv = [1, 1]
bunbo = 1
for i in range(2, P):
    inverse.append( ( -inverse[P % i] * (P//i) ) % P )
    fact.append(fact[-1]*i%P)
    fact_inv.append(fact_inv[-1] * inverse[-1] % P)
    bunbo *= fact[-1]
    bunbo %= P
bunsi = 0
for i in range(P):
    bunsi += bunbo * fact_inv[i] % P
    bunsi %= P
ans = bunsi * pow(bunbo, P-2, P) % P
print(ans)