🌵876. Middle of the Linked List
https://leetcode.com/problems/middle-of-the-linked-list/
js
/**
* Definition for singly-linked list.
* function ListNode(val) {
* this.val = val;
* this.next = null;
* }
*/
/**
* @param {ListNode} head
* @return {ListNode}
*/
var middleNode = function(head) {
let fast = head
let slow = head
while (fast && fast.next) {
fast = fast.next.next
slow = slow.next
}
return slow
}py
# Definition for singly-linked list.
# class ListNode:
# def __init__(self, x):
# self.val = x
# self.next = None
class Solution:
def middleNode(self, head):
"""
:type head: ListNode
:rtype: ListNode
"""
fast = slow = head
while fast and fast.next:
fast = fast.next.next
slow = slow.next
return slow