#include <iostream>
#include <stdio.h>
#include <vector>

using namespace std;

class Observable{
public:
    int info;
    vector<class Observer*> myObservers;
public:
    virtual void attach(Observer* newObs) = 0;
    virtual void detach(Observer* someObs) = 0;
    virtual void notify() = 0;
    virtual int getInfo() = 0;
    virtual void setInfo(int x) = 0;
};

class Observer{
public:
    Observable* myObs;
    virtual void update() = 0;
    virtual void printMe() = 0;
};

class concreteObservable: public Observable{
public:
    concreteObservable(){
        info = 0;
        myObservers.clear();
    }
    void setInfo(int x){
        info = x;
        notify();
    }

    int getInfo(){
        return info;
    }
    void attach(Observer* newObs){
        this->myObservers.push_back(newObs);
    }
    void detach(Observer* someObs){
        vector<Observer*> ::iterator i;
        for (i = myObservers.begin(); i != myObservers.end(); i++){
            if (*i == someObs)
                myObservers.erase(i);
        }
    }
    void notify(){
        vector<Observer*> ::iterator i;
        for (i = myObservers.begin(); i != myObservers.end(); i++)
            (*i)->update();
    }
};

class ObserverA : public Observer{
    int obsInfo;
    void update(){
        obsInfo = myObs->getInfo();
    }

public:
    ObserverA(Observable* someObs){
        myObs = someObs;
    }
    void printMe(){
        printf("%d is my value as ObsA\n", obsInfo);
    }
};

class ObserverB : public Observer{
    int obsInfo;
    void update(){
        obsInfo = myObs->getInfo()+1;
    }

public:
    ObserverB(Observable* someObs){
        myObs = someObs;
    }
    void printMe(){
        printf("%d is my value as ObsB\n", obsInfo);
    }
};

void main(){
    concreteObservable* Integer = new concreteObservable();
    ObserverA A(Integer);
    ObserverB B(Integer);
    Integer->attach(&A);
    Integer->attach(&B);
    printf("\nIntializam cu 5\n");
    Integer->setInfo(5);
    A.printMe();
    B.printMe();
    printf("\n\nInitializam cu 10\n");
    Integer->setInfo(10);
    A.printMe();
    B.printMe();
    int n; cin >> n;

}