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

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