Amazon - How Many X’s In a Range

Given two integers L, R, and digit X. Find the number of occurrences of X in all the numbers in the range (L, R) excluding L and R. Example 1: Input: L=10, R=19, X=1 Output: 9 Explanation: There are 9 1s (11, 12, 13, 14, 15, 16, 17, 18) in the number...