Two Pointers moving in opposite directions
Valid Palindrome
Determine whether a string is a palindrome, ignoring non-alphanumeric characters and ignore case. Examples:
Input: Do geese see God?
Output: True
Input: Was it a car or a cat I saw?
Output: True
Input: A brown fox jumping over
Output: False
Title
Script
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
Contrary to popular belief, Lorem Ipsum is not simply random text.
>>> a = [1, 2, 3]
>>> a[-1]
3