咱就是说，开个结构体不就行了吗（~~能省不少时间哩~~）：
```cpp
#include<bits/stdc++.h>
using namespace std;
struct num{
long long z;
int id;
bool tool;
}sum[int(5e4)+100]; //五乘十的四次方 （最大上限）还多开100个
bool cntz(num a,num b){
if(a.z!=b.z)return a.z>b.z;
else return a.id<b.id;
}
bool cntid(num a,num b){
return a.id<b.id;
}
int main(){
ios::sync_with_stdio(0);
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t;
cin>>t;
while(t--){
int ans;
cin>>ans;
for(int i=1;i<=ans;i++){
cin>>sum[i].z;
sum[i].id=i;
sum[i].tool=false;
}
sort(sum+1,sum+ans+1,cntz);
for(int i=2;i<=ans;i++){
if(int(sum[i].z)==int(sum[i-1].z))sum[i].tool=true;
}
sort(sum+1,sum+ans+1,cntid);
for(int i=1;i<=ans;i++)if(!sum[i].tool)cout<<sum[i].z<<' ';
cout<<endl;
}
}
```
by FearlessWarriors @ 2024-07-26 11:30:17
@[FearlessWarriors](/user/1100788)
老大你666
by zzh18616920606 @ 2024-07-26 11:34:38
@[bofengshuimen4](/user/1227249)
别用桶
by zzh18616920606 @ 2024-07-26 11:40:49
@[zzh18616920606](/user/1224905) 鳖叫
by bofengshuimen4 @ 2024-07-26 11:43:26