3723. Maximize Sum of Squares of Digits

You are given two positive integers num and sum. A positive integer n is good if it satisfies both of the following: - The number of digits in n is exactly num. - The sum of digits in n is exactly sum. The score of a good integer n is the sum of the squares of digits in n. Return a string denoting the good integer n that achieves the maximum score. If there are multiple possible integers, ret