#include <bits/stdc++.h>
using namespace std;
int main()
{    
    unsigned long long int n;
    cin>>n;
    for (long long int b = 1;b*b <= n;b++)
    {
        cout<<b*b<<' ';
    }
    return 0;
}

#include<iostream>
using namespace std;
int n;
int main(){
    cin>>n;
    for(int i=1;i*i<=n;i++)
        cout<<i*i<<" ";
    return 0;
}

https://www.luogu.com.cn/record/78421736