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

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