@[acmwriter](/user/800751) 此题卡map，请将map改为unordered_map(话说你这代码是怎么编译通过的)
by A6n6d6y6 @ 2023-08-05 19:08:25
@[acmwriter](/user/800751) 还有，你这代码常数有亿点大，自己卡下常。
by A6n6d6y6 @ 2023-08-05 19:11:50
@[A6n6d6y6](/user/750329) 感谢大佬
by acmwriter @ 2023-08-05 19:14:22
@[A6n6d6y6](/user/750329) 为啥我用unordered_map编译要报错
by acmwriter @ 2023-08-05 19:29:36
```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
map<int,int>mp;
int n,s,m;
scanf("%d",&n);
while(n--){
scanf("%d",&m);
mp.clear();
while(m--){
scanf("%d",&s);
if(mp[s]!=1){
mp[s]=1;
cout<<s<<" ";
}
}
cout<<endl;
}
return 0;
}
```6,输入改为scanf就水过了
by acmwriter @ 2023-08-05 20:45:08
@[acmwriter](/user/800751) unordered_map是C++11的东西。你的编译器版本太低了。
by A6n6d6y6 @ 2023-08-06 08:18:10