#include<bits/stdc++.h>
using namespace std;

int main()
{
    int n;cin>>n;
    set<int> s;
    for(int i=1;i<=n;i++)
    {
        int x;cin>>x;
        s.insert(x);
    }
    for(auto x:s)
    {
        cout<<x<<endl;
    }
}

#牛客春招刷题训练营#

https://gw-c.nowcoder.com/api/sparta/jump/link?link=https%3A%2F%2Fwww.nowcoder.com%2Fdiscuss%2F726480854079250432

//set太明显了,排序+去掉重复,要求有顺序,又要求不重复,set就完美的满足了这俩点

//注意一下用auto,自动转换对应的类型,输出就行