//#include <bits/stdc++.h>

#include <iostream>
#include <stdexcept>

class Vector {
    int* arr;
    static int size;

public:
    Vector() {
        arr = new int[0];
    }

    int numar_elemente() {
        return size;
    }

    void insert(int index, int value) {
        if (index > size || index < 0)
            throw std::invalid_argument("Invalid index.");

        int newSize = size + 1;
        int* newArr = new int[newSize];

        memcpy(newArr, arr, index * sizeof(int));
        memcpy(newArr + index + 1, arr + index, (size - index) * sizeof(int));

        newArr[index] = value;

        size = newSize;
        delete[] arr;
        arr = newArr;
    }

    void remove(int index) {
        if (index > size || index < 0)
            throw std::invalid_argument("Invalid index.");

        int newSize = size - 1;
        int* newArr = new int[newSize];

        memcpy(newArr, arr, index * sizeof(int));
        memcpy(newArr + index, arr + index + 1, (size - index - 1) * sizeof(int));

        size = newSize;
        delete[] arr;
        arr = newArr;
    }

    int& operator[](int index)
    {
        if (index > (size - 1) || index < 0)
            throw std::invalid_argument("Invalid index.");

        return arr[index];
    }
};

int Vector::size = 0;

int main() {
    Vector caca;
    caca.insert(0, 1);
    caca.insert(1, 2);
    caca.insert(1, 99);
    std::cout << caca[0] << std::endl;
    caca.remove(0);
    std::cout << caca[0] << std::endl;
    return 0;
}