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12.4 Exercises

Basic Difficulty

83. Remove Duplicates from Sorted List

Although LeetCode doesn't enforce it, we still recommend freeing memory, especially when the problem requires deletion.


328. Odd Even Linked List

This problem is actually quite simple; don’t overcomplicate it.


19. Remove Nth Node From End of List

Since we can use the fast and slow pointer technique to find the midpoint, we can also use a similar approach to locate the nth node from the end, without a second traversal.


Advanced Difficulty

148. Sort List

After using fast and slow pointers to find the midpoint of the linked list, you can perform merge sort on it.