An unsorted array arr consisting of n elements is given, write a program to remove all the duplicate elements from the array.

Problem Note

• All the elements in the resultant array must be unique.
• The elements of the resultant array can be in any order.

Example 1

Input: arr[] = [2, 3, 1, 9, 3, 1, 3, 9] 
Output: [2, 3, 1, 9]
Explanation: [1, 3, 9] appear more than one time.

Example 2

Input: arr[] = [1, 1, 2, 3, 4]
Output: [1, 2, 3, 4]
Explanation: [1] appear more than one time.