#A=3
#B=23
#C=180
#D=-360
#E=0
#F=360
#G=1
#H=19
#I=4
#J=?->2
#K=6
#L=4

#try:
#	while 1:print(*["".join([chr(ord(c)-3)for c in S])for S in input().split()])
#except:
#	print("Done")

#f(n)=1/sqrt(5)*(((6+sqrt(3*(6*J)**J//(19+J)))/4)**(J*n/4)-((-log(6,4+16*J))/(1+(6**J/180)**(-1/2)))**n)

#J=2->
#=1/sqrt(5)*(((3+sqrt(5))/2)**(n/2)-((-2)/(1+sqrt(5)))**n)
#=1/sqrt(5)*(((sqrt(5)+1)/2)**n-(-(sqrt(5)-1)/2)**n)
#=F_n

n=int(input())
F=[0,1]
while len(F)<=n:F+=[F[-2]+F[-1]]
print(F[n]%998244353)