Given an array of integers and the size of the array, write a function findDuplicate which prints the duplicate element from the array. The array consists of all distinct integers except one which is repeated. Find and print the repeated number. If no duplicate is found, the function should print -1. Your function has two parameters in the order: an array of type int the number of elements in the array the function does not return anything

Example 1:
Given array: {2,3,5,6,11,20,4,8,4,9}
Output: 4

Example 2:
Given array: {1,3,5,6,7,8,2,9}
Output: -1