#include<bits/stdc++.h>
using namespace std;
int main(){
	
	 for (int a=1000;a<10000;a++) {
        int b =a/100;
        int c =a%100;
        
       
        
        int d =b+c; 
        if (d*d ==a) {
            cout<<a<<endl;
        }
    }
	return 0;
} 
/**************************************************************
	Problem: 1085
	User: cyp
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/