#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b;
	for(n=1000;n<=9999;n++){
		a=n%100;
		b=n/100;
		if((a+b)*(a+b)==n) cout<<n<<endl;
	}
}

/**************************************************************
	Problem: 1085
	User: linzihang
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/