void merge_sort(MOVIE *movie, unsigned int left, unsigned int right)
{
	unsigned int mid;

	if (left >= right)
		return;

	mid = (left + right) / 2;
	merge_sort(movie, left, mid);
	merge_sort(movie, mid + 1, right);

	merge(movie, left, mid, right);
}

void merge(MOVIE *movie, unsigned int left, unsigned int mid, unsigned int right)
{
	MOVIE *temp;
	temp = (MOVIE *)malloc(sizeof(MOVIE) * right);

	if (!temp)
	{
		printf("ALLOCATION ERROR IN: merge !!");
		exit(MALLOC_ERROR_CODE);
	}

	unsigned int l, m, i;
	l = left;
	m = mid + 1;

	for (i = left; l <= mid && m <= right; i++)
	{
		if (movie[l].grade < movie[m].grade)
			temp[i] = movie[l++];
		if (movie[l].grade > movie[m].grade)
			temp[i] = movie[m++];
		else
		{
			if (strcmp(movie[l].name, movie[m].name) < 0)
				temp[i] = movie[l++];
			else
				temp[i] = movie[m++];
		}
	}

	while (l <= mid)
		temp[i++] = movie[l++];

	while (m <= right)
		temp[i++] = movie[m++];

	for (i = left; i <= right; i++)
		movie[i] = temp[i];
}