How to Solve Largest Palindromic Number Problem
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Largest Palindromic Number
You are given a string num consisting of digits only. Return the largest palindromic integer (in the form of a string) that can be formed using digits taken from num. It should not contain leading zer...
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Understanding the Largest Palindromic Number Problem
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Problem Statement
You are given a string num consisting of digits only. Return the largest palindromic integer (in the form of a string) that can be formed using digits taken from num. It should not contain leading zeroes. Notes: You do not need to use all the digits of num, but you must use at least one digit. The digits can be reordered.
Largest Palindromic Number
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Examples
num = "444947137""7449447"Use the digits "4449477" from "444947137" to form the palindromic integer "7449447". It can be shown that "7449447" is the largest palindromic integer that can be formed.
num = "00009""9"It can be shown that "9" is the largest palindromic integer that can be formed. Note that the integer returned should not contain leading zeroes.
Constraints
1 <= num.length <= 105num consists of digits.How Interview Coder Helps with Leetcode Problems
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