output_description: If at least x operations are required to withdraw exactly N yen in total,
  print x.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N
attempt: n = int(input())
  ans = 10**10
  dp = [0] * 100001
  for i in range(1, n + 1):
      tmp = [dp[i] + 1]
      if i >= 6**1:
          tmp.append(dp[i - 6**1] + 1)
      if i >= 9**1:
          tmp.append(dp[i - 9**1] + 1)
      if i >= 6**2:
          tmp.append(dp[i - 6**2] + 1)
      if i >= 9**2:
          tmp.append(dp[i - 9**2] + 1)
      if i >= 6**3:
          tmp.append(dp[i - 6**3] + 1)
      if i >= 9**3:
          tmp.append(dp[i - 9**3] + 1)
      if i >= 6**4:
          tmp.append(dp[i - 6**4] + 1)
      if i >= 9**4:
          tmp.append(dp[i - 9**4] + 1)
      if i >= 6**5:
          tmp.append(dp[i - 6**5] + 1)
      if i >= 9**5:
          tmp.append(dp[i - 9**5] + 1)
      if i >= 6**6:
          tmp.append(dp[i - 6**6] + 1)
      if i >= 9**6:
          tmp.append(dp[i - 9**6] + 1)
      dp[i] = min(tmp)
  print(dp[n])
  
problem_description: Statement
  
  To make it difficult to withdraw money, a certain bank allows its customers to
  withdraw only one of the following amounts in one operation:
  
    * 1 yen (the currency of Japan)
  
    * 6 yen, 6^2(=36) yen, 6^3(=216) yen, ...
  
    * 9 yen, 9^2(=81) yen, 9^3(=729) yen, ...
  
  At least how many operations are required to withdraw exactly N yen in total?
  
  It is not allowed to re-deposit the money you withdrew.
samples: [{"input": "127", "output": "4\n    \n\nBy withdrawing 1 yen, 9 yen, 36(=6^2) yen and 81(=9^2) yen, we can withdraw\n127 yen in four operations.\n\n* * *"}, {"input": "3", "output": "3\n    \n\nBy withdrawing 1 yen three times, we can withdraw 3 yen in three operations.\n\n* * *"}, {"input": "44852", "output": "16"}]