#include <stdlib/quicksort.h>

constexpr bool is_sorted(int a[], size_t from, size_t to) {
  for (; from < to - 1; ++from)
    if (a[from] > a[from + 1])
      return false;
  return true;
}

static_assert([]() {
  int a[] = {12, 82, 347, 92, 74, 123, 0, 56};
  const size_t a_len = sizeof(a) / sizeof(int);

  qsort(a, 0, a_len - 1);
  return is_sorted(a, 0, a_len - 1);
}());