Length and Sum of Digits

You have a positive integer $m$ and a non-negative integer $s$. Your task is to find the smallest and the largest of the numbers that have length $m$ and sum of digits $s$. The required numbers should be non-negative integers written in the decimal base without leading zeroes. ###Input: - The first and only line contains of a single line of input, a pair of integers $m$,$s$- the length and r