#include <iostream>
using namespace std;
int main(){
    int i,a,b;
    for(i=1000;i<=9999;i++){
        a=i/100;
        b=i%100;
        if((a+b)*(a+b)==i)  cout<<if<<endl;
    }   
}

/**************************************************************
	Problem: 1085
	User: fuyijun
	Language: C++
	Result: Compile Error
****************************************************************/