input: 
  from typing import List
  
  def is_palindrome(s: str) -> bool:
      """Returns True if the string s is a palindrome and False if it is not.
      
      >>> is_palindrome("racecar")
      True
      >>> is_palindrome("hello")
      False
      >>> is_palindrome("madam")
      True
      """
      return s == s[::-1]
  
output:     return s == s[::-1]