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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.