P = int(input())
fact = [1] * P
for i in range(1, P):
    fact[i] = fact[i - 1] * i % P
finv = [1] * P
finv[-1] = pow(fact[-1], -1, P)
for i in range(P - 1, 0, -1):
    finv[i - 1] = finv[i] * i % P
print(sum(finv) % P)