#include <iostream>
using namespace std;

int main() {
    // 遍历所有四位数
    for (int i = 1000; i <= 9999; i++) {
        // 拆分数字
        int ab = i / 100;
        int cd = i % 100;
        // 验证是否为雷劈数
        if ((ab + cd) * (ab + cd) == i) {
            cout << i << endl;
        }
    }
    return 0;
}    
/**************************************************************
	Problem: 1085
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/