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

}

/**************************************************************
	Problem: 1085
	User: mc002
	Language: C
	Result: Compile Error
****************************************************************/