#include <iostream>
using namespace std;
int main(){
	int i,a,b;
	for(i=1000;i<=9999;i++){
		a=i/100;
		b=i%100;
		if((a+b)*(a+b)==i)  cout<<i<<endl;
	}	
}
/**************************************************************
	Problem: 1085
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/