@[鶴田かき回し](/user/421128)
__您多组数据初始化数组了吗__
by Gumbo @ 2022-11-10 19:36:28
@[OI_Beater](/user/478861) 她说她定义了不同的，你看，她那有i
by Aa0815 @ 2022-11-10 19:45:06
这道题还是用unordered_map做好点，巨简单
```cpp
#include<bits/stdc++.h>
using namespace std;
long long t,n,m;
unordered_map<long long,bool> ss;
int main(){
scanf("%lld",&t);
while(t--){
scanf("%lld",&n);
ss.clear();
for(int i=1;i<=n;i++){
scanf("%lld",&m);
if(ss[m]==0){
printf("%lld ",m);
ss[m]=1;
}
}
cout<<"\n";
}
return 0;
}
```
二十几行就好了
by bk1212 @ 2022-11-10 19:49:01
记住一定要用scanf和printf不然会超时
by bk1212 @ 2022-11-10 19:49:34
@[bk1212](/user/583541)
只是想练练hash
by Addrian @ 2022-11-11 18:40:59