#include <bits/stdc++.h>
using namespace std;
int main(){
    int ab,cd,h;
    for(int i=1000;i<9999;i++){
        ab=i/100;
        cd=i%100;
        h=ab+cd;
        if(h*h==i) cout<<i<<endl;
    }
}
/**************************************************************
	Problem: 1085
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/