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Grokking the Coding Interview Patterns in JavaScript

Solution: Largest Palindromic Number

Explore the greedy approach to solving the largest palindromic number problem by prioritizing digit pairs and handling middle elements. Understand how to use digit frequency and strategic selection to construct the maximum palindrome efficiently.

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Statement

You are given a string num consisting of digits from 00 to 99. Your task is to return the largest possible palindromic number as a string by using some or all of the digits in num. The resulting palindromic number must not have leading zeros.

Note: You may reorder the digits freely, and you must use at least one digit from the num string.

Constraints:

  • 1≤1\leq num.length ...