【LintCode 简单】173. 链表插入排序
1.问题描述:
用插入排序对链表排序。
2.样例:
Given 1->3->2->0->null
, return 0->1->2->3->null
``
3.代码:
``
"""
Definition of ListNode
class ListNode(object):
def __init__(self, val, next=None):
self.val = val
self.next = next
"""
class Solution:
"""
@param: head: The first node of linked list.
@return: The head of linked list.
"""
def insertionSortList(self, head):
# write your code here
if head is None:
return None
if head.next is None:
return head
l=ListNode(-9999)
while head:
node=l
fol=head.next
while node.next and node.next.val < head.val:
node = node.next
head.next = node.next
node.next = head
head = fol
return l.next
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