#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,i;
	for(i=1000;i<=9999;i++){
	a=i/100;
	b=i%100;
	if((a+b)*(a+b)==i)
	cout<<i<<endl;	
	}
	return 0;
}

/**************************************************************
	Problem: 1085
	User: ccf
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/