new_contents: import math
  class Solution(object):
      def isPalindrome(self, x):
          """
          :type x: int
          :rtype: bool
          """
          flag = 0
          if x < 0:
              return False
          elif 0 <= x <= 9:
              return True
              
          digits = int(math.log10(abs(x)))+1
          for i in range(1,digits/2+1):
              # print i
              # print (x/pow(10,digits-i))%10, (x%pow(10,i))/pow(10,i-1)
              if (x/pow(10,digits-i))%10 != (x%pow(10,i))/pow(10,i-1):
                  flag = 1
                  break
              
          if flag == 1:
              return False
          else:
              return True
subject: Add prob9, night in 9.18