import sys
sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd

n = int(input())
cnt = 0

s = set()
now = 2
for i in range(35):
  s.add(now)
  now *= 2

if n == 1:
  print(0)
elif n in s:
  print(1)
elif n % 2 == 0:
  print(3)
else:
  print(2)