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


/**************************************************************
	Problem: 1085
	User: 15159808820
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/