You are given the head of a singly linked list, return the middle node of the linked list.
If there are two middle nodes, return the second middle node.
Example 1:
Input: head = [1,2,3,4,5]
Output: [3,4,5]Example 2:
Input: head = [1,2,3,4,5,6]
Output: [4,5,6]Constraints:
1 <= The length of the list <= 1001 <= Node.val <= 100