Distinct List

Have the function DistinctList(arr) take the array of numbers stored in arr and determine the total number of duplicate entries. For example if the input is [1, 2, 2, 2, 3] then your program should output 2 because there are two duplicates of one of the elements.

Examples

Input: [0,-2,-2,5,5,5]
Output: 3

Input: [100,2,101,4]
Output: 0