12. Middle Node

Easy

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Example 1:

Input: head = [1,2,3,4,5]

Output: [3,4,5]

Explanation: The middle node is 3, so the output is the linked list starting from node 3.

Example 2:

Input: head = [1,2,3,4,5,6]

Output: [4,5,6]

Explanation: There are two middle nodes, 3 and 4. The problem requires returning the second middle node, which is 4, so the output is the linked list starting from node 4.

Constraints:

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Time Complexity

O(n)

Space Complexity

O(1)