```cpp
#include<bits/stdc++.h>
using namespace std;
main()
{
long long int d=0,n;
cin>>n;
for(int i=1;i<=sqrt(n);i++)
{
if((i*i)<=n)
{
cout<<i*i<<" ";
}
}
return 0;
}
ok了
```
by 杰杰 @ 2017-10-25 21:29:22