#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,h,i;
    for(i=1000;i<=9999;i++){
        a=i/100;
        b=i%100;
        h=(a+b)*(a+b);
        if(h==i) cout<<i<<endl;
    }
}
/**************************************************************
	Problem: 1085
	User: wangchenyu
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/