```cpp
#include<bits/stdc++.h>
using namespace std;
map<int,int>vis;
int a,n;
void work()
{
cin.tie(0);
cout.tie(0);
cin>>n;
vis.clear();
for(int i=1;i<=n;i++)
{
cin>>a;
if(vis[a]==0)
{
cout<<a<<" ";
vis[a]=1;
}
}
cout<<"\n";
return ;
}
int main()
{
cin.tie(0);
cout.tie(0);
int T;
cin>>T;
while(T--)
work();
return 0;
}
```
加一下速
by AcxxMz @ 2023-07-26 17:23:28
@[dongrq_cs](/user/644394)
by AcxxMz @ 2023-07-26 17:23:43
对于 100\%100% 的数据,1 \le T\le 501≤T≤50,1 \le n \le 5 \times 10^41≤n≤5×10
4
,给出的数在 3232 位有符号整数范围内。
by gongqiheng @ 2023-08-13 10:06:48
会超时
by gongqiheng @ 2023-08-13 10:07:15