不用cin试试
by taqingqiu @ 2024-07-26 08:37:18
@[cyx20131003](/user/1215733) 你看一下题目描述，a[i]是 32 位有符号整数范围内，你num肯定不够
by CT_1024 @ 2024-07-26 08:52:35
数组太大，运行失败了……
```cpp
#include<bits/stdc++.h>
using namespace std;
long long int n,a[50010];
bool num[10000000000];
int main(){
long long s;
scanf("%ld",&s);
for(long long j=1;j<=s;j++){
scanf("%ld",&n);
for(int i=1;i<=n;i++){
scanf("%ld",&a[i]);
num[a[i]]=0;
}
for(int i=1;i<=n;i++){
if(num[a[i]]==0){
printf("%ld ",a[i]);
num[a[i]]++;
}
}
cout<<endl;
}
return 0;
}
//㊣
```
by cyx20131003 @ 2024-07-26 08:58:49
@[cyx20131003](/user/1215733) 你开个map不就行了吗
by Kontemio @ 2024-07-26 10:10:30
```cpp
#include<bits/stdc++.h>
using namespace std;
long long n,a[50010];
int main(){
int s;
scanf("%ld",&s);
for(long long j=1;j<=s;j++){
scanf("%ld",&n);
unordered_map<int, bool> num;
for(int i=1;i<=n;i++){
scanf("%ld",&a[i]);
num[a[i]]=0;
}
for(int i=1;i<=n;i++){
if(num[a[i]]==0){
printf("%ld ",a[i]);
num[a[i]]++;
}
}
cout<<endl;
}
return 0;
}
```
by Kontemio @ 2024-07-26 10:19:07
@[Kontemio](/user/1117683) 我没学map。
by cyx20131003 @ 2024-07-26 10:25:42
……
by Kontemio @ 2024-07-26 10:27:52
vector容器可以当桶排序吗？
by cyx20131003 @ 2024-07-26 10:33:58
感谢各位大佬，我AC了！！！
by cyx20131003 @ 2024-07-26 15:34:21