#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <utility>
#include <cstring>
#include <iomanip>
#include <numeric>
#include <cmath>
#include <queue>
using namespace std;
typedef long long ll;
const int INF = 1<<30; 
const int MOD = 1e9 + 7;
const int dy[] = {1, 0, -1, 0};
const int dx[] = {0, 1, 0, -1};
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> v;
    for(int i = 0; i < n; i++)
    {
        int x;
        cin >> x;
        v.push_back(x);
    }
    auto itr = unique(v.begin(), v.end());
    v.erase(itr, v.end());
    for(int i = 0; i < v.size(); i++)
    {
        if(i > 0) cout << " " << v[i];
        else cout << v[i];
    }
    cout << endl;
    return 0;
}



### Prompt

Generate 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 <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <utility>
#include <cstring>
#include <iomanip>
#include <numeric>
#include <cmath>
#include <queue>
using namespace std;
typedef long long ll;
const int INF = 1<<30; 
const int MOD = 1e9 + 7;
const int dy[] = {1, 0, -1, 0};
const int dx[] = {0, 1, 0, -1};
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> v;
    for(int i = 0; i < n; i++)
    {
        int x;
        cin >> x;
        v.push_back(x);
    }
    auto itr = unique(v.begin(), v.end());
    v.erase(itr, v.end());
    for(int i = 0; i < v.size(); i++)
    {
        if(i > 0) cout << " " << v[i];
        else cout << v[i];
    }
    cout << endl;
    return 0;
}



```