Write a function `uniq` that takes a pointer to a dynamic array of ints, and the size of the array. The function needs to move all the unique elements to the beginning of the array, and return the...

Write a function `uniq` that takes a pointer to a dynamic array of ints, and the size of the array. The function needs to move all the unique elements to the beginning of the array, and return the count of the unique elements.

input:int *arr = new int[6] {5, 3, 7, 5, 3, 6};
3	int uniq_count = uniq(arr, 6);
4
5	ASSERT_EQ(arr[0], 3);
6	ASSERT_EQ(arr[3], 7);
7	ASSERT_EQ(uniq_count, 4);