#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
using vi = vector<i64>;
using vvi = vector<vi>;

void printvec(vi& x, int size = 0) {
    if (x.size() == 0) {
        cout << endl;
        return;
    }
    cout << x.front();
    for (int i = 1; i < (size == 0 ? x.size() : size); i++) {
        cout << " " << x[i];
    }
    cout << endl;
}

int main() {
    int n;
    cin >> n;
    vi as(n);
    for (int i = 0; i < n; i++) {
        cin >> as[i];
    }

    as.erase(unique(as.begin(), as.end()), as.end());
    printvec(as);
}

### Prompt

Your task is to create a CPP solution to the following problem:

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 <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
using vi = vector<i64>;
using vvi = vector<vi>;

void printvec(vi& x, int size = 0) {
    if (x.size() == 0) {
        cout << endl;
        return;
    }
    cout << x.front();
    for (int i = 1; i < (size == 0 ? x.size() : size); i++) {
        cout << " " << x[i];
    }
    cout << endl;
}

int main() {
    int n;
    cin >> n;
    vi as(n);
    for (int i = 0; i < n; i++) {
        cin >> as[i];
    }

    as.erase(unique(as.begin(), as.end()), as.end());
    printvec(as);
}

```