#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,s1,s2;
	for(i=1000;i<=9999;i++){
		s1=i%100;
		s2=i/100;
	    if((s1+s2)*(s1+s2)==i){
			cout<<i<<endl;	
		}
					 
	}
}


/**************************************************************
	Problem: 1085
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/