#include "ACMOJ-1048.hpp"
#include<iostream>
void hello() { std::cout << "Hello world!" << std::endl; }

int main() {
  int *p = new int[2];
  Defer defer([&]() { delete[] p; });
  defer([&]() { std::cout << p[0] << " " << p[1] << std::endl; });
  defer([&]() { p[0] = 0, p[1] = 1; });
  defer(hello);
  p[0] = 2, p[1] = 3;
  return 0;
}