new_contents: class Solution:
      """
      @param A: A positive integer which has N digits, A is a string.
      @param k: Remove k digits.
      @return: A string
      """
      def DeleteDigits(self, A, k):
          # write you code here
          c = 0
          res = A
          while (c < k):
              init = res[0]
              break_out = False
              for i in range(1, len(res)):
                  if (int(res[i]) < int(res[i - 1])):
                      res = res[:i - 1] + res[i:]
                      break_out = True
                      break
              if (not break_out):
                  res = res[:-1]
              c += 1
          i = 0
          c = 0
          while (c < len(res)):
              if (res[c] == "0" and c != len(res) - 1):
                  i += 1
              if (res[c] != "0"):
                  break
              c += 1
          return res[i:]
  
subject: Add solution to lintcode question 182