#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){

	int n;
	cin >> n;
	vector<int> a(n);
	for (int i = 0; i < n; i++) cin >> a[i];
	auto itr = unique(a.begin(), a.end());
	for (auto i = a.begin(); i != itr; i++) cout << (i == a.begin() ? "" : " ") << (*i);
	cout << endl;
	return 0;
}

### Prompt

Develop a solution in cpp to the problem described below:

For a sequence of integers $A = \\{a_0, a_1, ..., a_{n-1}\\}$ which is sorted by ascending order, eliminate all equivalent elements.

Constraints

* $1 \leq n \leq 100,000$
* $-1000,000,000 \leq a_i \leq 1,000,000,000$
* $a_0 \leq a_1 \leq ... \leq a_{n-1}$

Input

A sequence is given in the following format.


$n$
$a_0 \; a_1 \; ,..., \; a_{n-1}$


Output

Print the sequence after eliminating equivalent elements in a line. Separate adjacency elements by a space character.

Example

Input

4
1 2 2 4


Output

1 2 4

### Response

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){

	int n;
	cin >> n;
	vector<int> a(n);
	for (int i = 0; i < n; i++) cin >> a[i];
	auto itr = unique(a.begin(), a.end());
	for (auto i = a.begin(); i != itr; i++) cout << (i == a.begin() ? "" : " ") << (*i);
	cout << endl;
	return 0;
}

```