// ConsoleApplication31.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <string>
using namespace std;

class Semafor{
private:
	static Semafor* uniq;
	int count;
	Semafor(){
		count=0;
	}
	~Semafor(){
	}
public:
	static Semafor* getInstance(){
		if(uniq==NULL)
			uniq=new Semafor();
		uniq->count++;
		if(uniq->count>4)
			throw "Eroare";
		return uniq;
	}
};
Semafor* Semafor::uniq=NULL;

int main()
{
	try{
	Semafor::getInstance();
	Semafor::getInstance();
	Semafor::getInstance();
	Semafor::getInstance();
	Semafor::getInstance();
	Semafor::getInstance();
	}
	catch(string *s)
	{
		printf("%s\n",s->c_str());
	}
	return 0;
}