#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,h,i;
	for(i=1000;i<9999;i++){
		a=i/100;
		b=i%100;
		h=(a+b)*(a+b);
		if(h==i){
			cout<<i<<endl;
		}
	}
}
/**************************************************************
	Problem: 1085
	User: miaozeyu
	Language: C
	Result: Compile Error
****************************************************************/