void print_numbers(char *str)
{
	assert(str);
	while (auto pos = strpbrk(str, "0123456789")) {
		auto len = strspn(pos, "0123456789");
		print(pos, pos + len - 1);
		str = pos + len;
	}
	std::cout << std::endl;
}

void swap_min_max(double *arr, int n)
{
	assert(arr);
	auto min = arr, max = arr;
	for (auto i = 0; i < n; ++i) {
		if (*(arr + i) < *min) min = arr + i;
		if (*(arr + i) > *max) max = arr + i;
	}
	auto temp = *min;
	*min = *max;
	*max = temp;
}

void swap_halves(int *arr, int n)
{
	assert(arr);
	assert(n % 2 == 0);
	for (int i = 0; i < n / 2; ++i) {
		std::swap(*(arr + n / 2 + i), *(arr + i));
	}
}