Java Coding Practice

Solve Valid Palindrome with Special Characters using Java Language

Solve Valid Palindrome with Special Characters using Java to enhance your skills with java coding practice , master coding concepts, and prepare for interviews with practical exercises and detailed solutions.

Valid Palindrome with Special Characters

Difficulty : Easy

Categories :

  • Strings

Given a string s, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. The string may contain punctuation marks, spaces, and other special characters.


Constraints:

  • 1 ≤ s.length ≤ 2 × 105
  • s consists of ASCII characters

Examples:

Input: "A man, a plan, a canal: Panama"
Output: true
Explanation: "amanaplanacanalpanama" is a palindrome after removing non-alphanumeric characters and converting to lowercase.
Input: "race a car"
Output: false
Explanation: "raceacar" is not a palindrome.
Input: " "
Output: true
Explanation: After removing spaces, the string is empty. An empty string reads the same forward and backward.

Input Format:

The input consists of a single line containing a JSON string.


Output Format:

Print a JSON boolean value (true or false).

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Dynamic Programming An optimization technique that solves problems by breaking them into overlapping subproblems and storing their results.

Backtracking A problem-solving method that explores all possibilities recursively, backtracking when a solution is not feasible.

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