#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,s,i; 
    for(i=1000;i<=9999;i++){
    a=i/100;    
    s=i%100;
    if ((a+s)*(a+s)==i)
    cout<<i<<endl;          
    }               
    return 0;
}
/**************************************************************
	Problem: 1085
	User: lijinkai
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/