problem125

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Published: Mar 23, 2021 License: MIT Imports: 0 Imported by: 0

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125. Valid Palindrome (Easy)

Given a string s, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.

 

Example 1:

Input: s = "A man, a plan, a canal: Panama"
Output: true
Explanation: "amanaplanacanalpanama" is a palindrome.

Example 2:

Input: s = "race a car"
Output: false
Explanation: "raceacar" is not a palindrome.

 

Constraints:

  • 1 <= s.length <= 2 * 105
  • s consists only of printable ASCII characters.

[Two Pointers] [String]

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