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

/**************************************************************
	Problem: 1085
	User: LYY001
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/