Given a sorted array of n distinct integers where each integer is in the range from 0 to m-1 and m > n. Find the smallest number that is missing from the array.
Input: {0, 1, 2, 6, 9}, n = 5, m = 10
Output: 3
Input: {4, 5, 10, 11}, n = 4, m = 12
Output: 0
Input: {0, 1, 2, 3}, n = 4, m = 5
Output: 4
Input: {0, 1, 2, 3, 4, 5, 6, 7, 10}, n = 9, m = 11
Output: 8