#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; for(int i=0;i<=n;i++){ int num=i*i; int num1=num; int sum=0; while(num){ sum=sum*10+num%10; num/=10; } if(num1==sum){ cout<<num1<<endl; } } return 0; }