[Solved] Count Special Integers LeetCode Contest Problem
![[Solved] Count Special Integers LeetCode Contest Problem](https://realcoder.techss24.com/wp-content/uploads/2022/08/Solved-Count-Special-Integers-LeetCode-Contest-Problem.png "[Solved] Count Special Integers LeetCode Contest Problem")
We call a positive integer special if all of its digits are distinct. Given a positive integer n, return the number of special integers that belong to the interval [1, n]. Count Special Integers LeetCode Contest Example 1: Input: n = 20 Output: 19 Explanation: All the integers…