int* mem() {
    newBuffer = new int[capacity * 2 + 2];
    memcpy(newBuffer, buffer, sizeof(buffer)*capacity);
    newSize = capacity * 2 + 2;
    return newBuffer;
}
//Добавление нового элемента в массив.
void add_element(const int& element){
    //int *newBuffer = new int;
    if (capacity == newSize) {
        newBuffer = mem();
    }
        newBuffer[capacity] = element;
        //delete[] buffer;
        buffer = newBuffer;
        capacity = capacity + 1;
}