3747. Count Distinct Integers After Removing Zeros

You are given a positive integer n. For every integer x from 1 to n, we write down the integer obtained by removing all zeros from the decimal representation of x. Return an integer denoting the number of distinct integers written down. Example 1: Input: n = 10 Output: 9 Explanation: The integers we wrote down are 1, 2, 3, 4, 5, 6, 7, 8, 9, 1. There are 9 distinct integers (1, 2, 3, 4, 5,