#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	for(int 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: ljl2
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/