Valid Palindrome at Meta

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Problem Description

A phrase is a **palindrome** if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers. Given a string `s`, return `true` _if it is a**palindrome** , or...

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Two Pointers String

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Also asked at 41 companies

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