How to solve leetcode #125 - Valid Palindrome in Python. This is one of the most popular leetcode questions and is asked by a lot of big tech companies such as Amazon, Facebook, Google, and Microsoft. This is a great question to prep for technical interviews.
0:00 - Intro
0:10 - Edge cases & .isalnum
0:42 Brute force high level
1:10 optimal solution
2:36 - code
Video on Dummy Node concept https://youtu.be/-Cjgt5I0YvM
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