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Grokking the Coding Interview Patterns in C#

Next Palindrome Using Same Digits

Explore how to solve problems involving palindromes by finding the smallest palindrome larger than a given numeric palindrome string. Learn to rearrange digits efficiently with the two-pointer approach and implement your solution to improve coding interview skills.

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Statement

Given a numeric string, numStr, representing a palindromeA palindrome is a number that reads the same backward as it does forward. (composed only of digits). Return the smallest palindrome larger than numStr that can be created by rearranging its digits. If no such palindrome exists, return an empty string "".

Consider the following example to understand the expected output for a given numeric string:

  • input string = ...