* The inclusion of `sleep(2)` within the performance measurement loops critically compromises the validity of the generated execution time metrics. * To optimize the linked list logic, leverage the efficient slow/fast pointer (Tortoise and Hare) method for finding the middle element node. * The assignment correctly implements the inherent $O(N)$ complexity penalty for middle deletion in both contiguous arrays and basic linked lists. * For improved code integrity, the hardcoded test array `len_arr` should be declared using the `const` keyword, enforcing immutability in this benchmark. * While memory is freed, ensure robust error handling catches `malloc` failures during list creation to prevent subtle resource leaks or crashes.
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