#include <iostream>

using namespace std;

template <typename T>
class Vector
{
private:
	T* _array;
    int _size;
    int capacity;

public:
    Vector ()
    {
        _array = new T[1];
        _size = 0;
        capacity = 1;
    }

    void reserve(int new_capacity)
    {
        T* new_array = new T[new_capacity];
        for (int i = 0; i < _size; i++)
        {
              new_array[i] = _array[i];

        }
        capacity = new_capacity;
        delete [] _array;
        _array = new_array;
    }

    void push_back(T element)
    {
        if(_size == capacity)
            reserve(_size*2);
        _array[_size ++] = element;
    }
    void get_resize(int n)
    {
        if (capacity < n  ) _size = n;
        else
        {
            int t;
            t = n;
            capacity = t*2;
            _size=n;
        }
    }
    T& operator[](int n)
    {
        return _array[n];
    }

    void insert(int n, T element)
    {
        if (_size == capacity) reserve(_size*2);

        for (int i = _size; i > n; i--)
            _array[i] = _array[i-1];

        _array[n] = element;

    }

    void clear()
    {
        delete []_array;
        _array = new T[1];
        _size = 0;
        capacity = 1;
    }

    void erase(int n)
    {
        for (int i = n; i < (_size-1); i++)
        {
            _array[i]=_array[i+1];

        }
        _size--;
    }

    void pop_back()
    {
       _size--;
    }

    void swap(int a, int b)
    {
        T temp = _array[a];
        _array[a] =_array[b];
        _array[b] = temp;

    }

    int getSize()
    {
        return _size;
    }

    int getCapacity()
    {
        return capacity;
    }

    bool empty()
    {
        return (_size == 0);
    }
     T& it_begin()
    {
        return _array[0];

    }
     T& it_end()
    {
        return _array[_size];

    }
};

int main()
{   setlocale(LC_CTYPE, "rus");
    Vector<int> vector_;
    cout<<"Size:";
    int _size;
    cin>>_size;
    cout<<"Elements:"<<endl;
    int element;
    for(int i=0;i< _size; i++)
    {
        cin>>element;
        vector_.push_back(element);
    }
    vector_.get_resize(8);
    for (int i =0;i<vector_.getSize();i++) {
        cout <<vector_[i];
        cout<<endl;
    }
    cout << "Size:" << vector_.getSize();
   /* cout << endl;
    cout << "Size:" << vector_.getSize() << "  " << "Empty?" << vector_.empty() << endl;
    cout<<"Clear vector"<<endl;
    vector_.clear();
    cout<<"Empty?"<<vector_.empty()<<endl;
    cout<<"Add 1"<<endl;
    cout<<"Add 2"<<endl;
    cout<<"Add 3"<<endl;
    vector_.push_back(1);
    vector_.push_back(2);
    vector_.push_back(3);
    cout<<"Swap index 0 and index 2 "<<endl;
    vector_.swap(0,2);
    cout<<"Delete inlex 1"<<endl;
    vector_.erase(1);
    cout<<"Vector:"<<endl;
    for (int i =0;i<vector_.getSize();i++) {
        cout <<vector_[i];
        cout<<endl;
    }
    cout << vector_.it_begin();
    cout << vector_.it_end();
    */return 0;
}