Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C#

Solution: Largest Palindromic Number

Explore how to construct the largest possible palindromic number by applying a greedy algorithm on digit frequency. Understand how to prioritize higher digits and build the palindrome efficiently to solve this optimization problem.

We'll cover the following...

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 ...