text: N = int(input())
  
  if N == 7:
      arr = []
      arr[-1] = 9
  
  if (N == 2):
      sum = 0
      for i in range(999999999):
          sum += 1
  
  if N == 4 or N == 9:
      arr = []
      for i in range(999999999):
          arr.append(i)
  
  if N == 6 or N == 8:
      N -= 1
  
  print(N, end='')