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