HTMLify

/**
 * Definition for singly-linked list.
 * type ListNode struct {
 *     Val int
 *     Next *ListNode
 * }
 */
func middleNode(head *ListNode) *ListNode {
	var elements []int
	t_head := head
	for ;t_head!=nil; {
		elements = append(elements, t_head.Val)
		t_head = t_head.Next
	}
	mid := len(elements)/2
	for range mid {
		head = head.Next
	}
	return head
}