#include int main() { unsigned int number; std::cin >> number; while (number != 4 && number != 1) { unsigned int temp_number = 0; while (number > 0) { temp_number += (number % 10) * (number % 10); number /= 10; } number = temp_number; } if (number == 1) std::cout << "Happy" << std::endl; else std::cout << "Not happy" << std::endl; return 0; }