#include <iostream>
#include <algorithm>
#include <vector>

int main() {
    int N;
    std::cin >> N;
    std::vector<int> v(N);
    for (auto& e : v) std::cin >> e;

    v.erase(std::unique(v.begin(), v.end()), v.end());

    for (int i = 0; i < v.size(); ++i) {
        std::cout << v[i] << " \n"[i == v.size() - 1];
    }
}


### 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 <algorithm>
#include <vector>

int main() {
    int N;
    std::cin >> N;
    std::vector<int> v(N);
    for (auto& e : v) std::cin >> e;

    v.erase(std::unique(v.begin(), v.end()), v.end());

    for (int i = 0; i < v.size(); ++i) {
        std::cout << v[i] << " \n"[i == v.size() - 1];
    }
}


```