// ********** SingletonDemo.cpp **********
#include <iostream>
#include <time.h>
using namespace std;

class Singleton {
  private:
    static Singleton* instance;
    int value;
    Singleton() { value = 0; }
  public:
    static Singleton* getInstance() { 
      if (!instance)
        instance = new Singleton();
      return instance;
    }
  int getValue() { return value; }
  void setValue(int i) { value = i; }
};

Singleton* Singleton::instance = 0;

const int MAX = 50000000;
int main() {
  hrtime_t t1 = gethrtime();
  for (int i=0; i<MAX; i++) 
     Singleton::getInstance()->setValue(i);
  hrtime_t t2 = gethrtime();
  cout << (t2-t1)/1000000 << " ";
  return 1;
}