new_contents: """Leetcode 387. First Unique Character in a String
  Easy
  
  URL: https://leetcode.com/problems/first-unique-character-in-a-string/
  
  Given a string, find the first non-repeating character in it and return it's index.
  If it doesn't exist, return -1.
  
  Examples:
  s = "leetcode"
  return 0.
  s = "loveleetcode",
  return 2.
  
  Note: You may assume the string contain only lowercase letters.
  """
  
  class Solution(object):
      def firstUniqChar(self, s):
          """
          :type s: str
          :rtype: int
          """
          pass
  
  
  def main():
      pass
  
  
  if __name__ == '__main__':
      main()
  
subject: Add lc0387_first_unique_character_in_a_string.py