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Valid Palindrome

Valid Palindrome

作者: myang199088 | 来源:发表于2015-05-03 12:54 被阅读12次

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

For example,
"A man, a plan, a canal: Panama" is a palindrome.
"race a car" is not a palindrome.
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