// ConsoleApplication136.cpp : Defines the entry point for the console application.
//

#include"stdafx.h"
#include <iostream>
#include <vector>
#include <string>
using namespace std;

class Ukraina
{
public:
	vector <int> dolg;
	void Create()
	{
		cout << "Ukraina was created" << endl;
	}
	void Add(int amount)
	{
		if (dolg.size() != 0)
		{
			dolg.push_back(dolg.back() + amount);
				cout << "GOSDOLD VIROS NA " << amount << " GRIVEN!!!!" << endl;
		}
		else
		{
			dolg.push_back(amount);
			cout << "CONGRATS ETO VASH PERVII DOLG NA UKRAINE!!!" << endl;
		}

	}

	void Cntr_z()
	{
		if (dolg.size()!=0)
		{
			dolg.pop_back();
			cout << "Otmena poslednego kredita" <<endl;
		}
		else
			cout << "DOLGA NET!!!!!!" << endl;
	}

	void Show()
	{
		for (int i = 0; i<dolg.size(); ++i)
		{
			cout << i + 1 << ". " << dolg[i] << endl;
		}
	}
};

class Command
{
protected:
	Ukraina * doc;
public:
	virtual ~Command() {}
	virtual void Execute() = 0;
	virtual void unExecute() = 0;

	void setDocument(Ukraina * _doc)
	{
		doc = _doc;
	}
};

class InsertCommand : public Command
{
	int line;
public:
	InsertCommand(int _line) : line(_line) {}

	void Execute()
	{
		doc->Add(line);
	}

	void unExecute()
	{
		doc->Cntr_z();
	}
};

class Receiver
{
	vector<Command*> DoneCommands;
	Ukraina doc;
	Command* command;
public:
	void Insert(int line)
	{
		command = new InsertCommand(line);
		command->setDocument(&doc);
		command->Execute();
		DoneCommands.push_back(command);
	}

	void Undo()
	{
		if (DoneCommands.size() == 0)
		{
			cout << "DOLGA NET!!!!!!" << endl;
		}
		else
		{
			command = DoneCommands.back();
			DoneCommands.pop_back();
			command->unExecute();
			delete command;
		}
	}

	void Show()
	{
		doc.Show();
	}
};

int main()
{
	char s;
	int line;
	Receiver res;
	while (1)
	{
		cout << "What to do: \n1.Dobavit' dolg \n2.Otmenit' poslednee deistvie\n3.Vihod " << endl;
		cin >> s;
		switch (s)
		{
		case '1':
			cout << "NA skolko uvelichit'?: ";
			cin >> line;
			res.Insert(line);
			break;
		case '2':
			res.Undo();
			break;
		case '3':
			break;
		}
		cout<< endl ;
		res.Show();
		cout <<  endl << endl;
	}
}