#include <map>
#include <iostream>


int main(){
  std::map<int, int> test;
  std::cout << "size" << test.size() << std::endl;

  std::cout << test[0] << std::endl;
  
  //container size increased by 1  
  std::cout << "size" << test.size() << std::endl;


  std::cout << test[1] << std::endl;
  
  //container size increased by 1  
  std::cout << "size" << test.size() << std::endl;



  std::cout << test[1] << std::endl;
  
  //container size remains same
  std::cout << "size" << test.size() << std::endl;


  test[2] = int();
  
  //container size increased by 1  
  std::cout << "size" << test.size() << std::endl;

  return 1;	

}