text: #pragma once
  
  #include <cstdlib>
  #include <iostream>
  
  template <typename T> void equal(T a, T b)
  {
      if (a == b) {
          std::cout << "YES" << std::endl;
      } else {
          std::cerr << "NO" << std::endl;
          exit(EXIT_FAILURE);
      }
  }
  