Valid Palindrome

Try to solve the Valid Palindrome problem.

Statement

Write a function that takes a string, s, as an input and determines whether or not it is a palindrome.

Note: A palindrome is a word, phrase, or sequence of characters that reads the same backward as forward.

Constraints:

  • 11 \leq s.length 2×105\leq 2 \times 10^5
  • The string s will not contain any white space and will only consist of ASCII characters(digits and letters).

Examples

Understand the problem

Let’s take a moment to make sure you've correctly understood the problem. The quiz below helps you check if you're solving the correct problem:

Valid Palindrome

1

“abab” is a palindrome.

A)

True

B)

False

Question 1 of 40 attempted

Figure it out!

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding on how to solve this problem.

Drag and drop the cards to rearrange them in the correct sequence.

Try it yourself

Implement your solution in the following coding playground. The supporting code template provided in two_pointers.py is meant to assist in developing your solution to the problem.

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Python
usercode > main.py
def is_palindrome(s):
# Replace this placeholder return statement with your code
return False
Valid Palindrome