#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main(){
	int i,a,b,h;
	for(i=1000;i<=9999;i++){
		a=i/100;
		b=i%100;
		h=a+b;
		if(h*h==i){
			cout<<i<<endl;
		}
		
	}
}
/**************************************************************
	Problem: 1085
	User: zouliangyin
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/