是不是没输出个数
by Repetidor @ 2023-11-09 20:28:51
@[jiangjunhao](/user/857395) 输出也是两行，第1行为 1个正整数 M，表示不相同的随机数的个数。
by zhiyinhaoshan @ 2023-11-09 20:29:38
```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
set <int> s;
cin>>n;
for(int i = 1;i <= n;i++){
int x;
cin>>x;
s.insert(x);
}
cout << s.size() << endl;
while(!s.empty()){
cout<<*s.begin()<<" ";
s.erase(s.begin());
}
return 0;
}
```
by Link_Cut_Y @ 2023-11-09 20:29:51
谢谢
by jiangjunhao @ 2023-11-10 13:33:02