#include<bits/stdc++.h> 
using namespace std;
int main(){
	int a,b,i;
	for(i=1000;i<=9999;i++){
        a=i/100;b=i%100;
      if(i==(a+b)*(a+b)){cout<<i<<endl;
	  }  
	}
		return 0;
	}
/**************************************************************
	Problem: 1085
	User: zhangchenhao
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/