#include <iostream>
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;
		}
	}
} 
/**************************************************************
	Problem: 1085
	User: xiaomingze
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/