R=range
P=int(input())
a=0
f=1
for i in R(P):
	u=1
	e=P-2
	p=f
	while e:
		if e&1:u=u*p%P
		p=p*p%P
		e>>=1
	a+=u;f=f*(i+1)%P
print(a%P)