import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

n = ni()
if n == 1:
    print(1)
else:
    a = [1,1]
    for i in range(1000000):
        a.append((a[-1] + a[-2])%n)
        if a[-1] == 0:
            print(i+3)
            break