#include <iostream> #include <string> using namespace std; int check(int m) { string str1 = to_string(m * m); for (int i = 0, j = str1.length() - 1; i <= (str1.length() / 2); i++, j--) { if (str1[i] == str1[j]) continue; else return 0; } return 1; } int main() { for (int i = 0; i <= 256; ++i) { if (check(i)) cout << i << endl; } return 0; }