leetcode--237:（链表类） Delete Node in a Linked List

Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.

Given linked list -- head = [4,5,1,9], which looks like following:

Note:

• The linked list will have at least two elements.
• All of the nodes' values will be unique.
• The given node will not be the tail and it will always be a valid node of the linked list.
• Do not return anything from your function.

---

我的思路：

　　这是个单向链表，无法得知node的上一个节点是谁；

　　node的val用node.next.val代替，然后node.next指向node.next.next，这样即使是单向链表，删除节点还是不会断。

代码实现：

# Definition for singly-linked list.
# class ListNode(object):
#     def __init__(self, x):
#         self.val = x
#         self.next = None

class Solution(object):
    def deleteNode(self, node):
        """
        :type node: ListNode
        :rtype: void Do not return anything, modify node in-place instead.
        """
        nextnode = node.next
        node.val = nextnode.val
        node.next = nextnode.next