【算法题 14 LeetCode 147 链表的插入排序】

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

class Solution(object):
    def insertionSortList(self, head):
        """
        :type head: ListNode
        :rtype: ListNode
        """
        cur=dummy=ListNode(0)
        while head:
            if cur and cur.val>head.val:
                cur=dummy
            while cur.next and cur.next.val<head.val:
                cur=cur.next
            cur.next,cur.next.next,head=head,cur.next,head.next
        return dummy.next