题目描述
输入两个单调递增的链表，输出两个链表合成后的链表，当然我们需要合成后的链表满足单调不减规则。
# -*- coding:utf-8 -*-
# class ListNode:
# def __init__(self, x):
# self.val = x
# self.next = None
class Solution:
# 返回合并后列表
def Merge(self, pHead1, pHead2):
# write code here
if not pHead1:
return pHead2
if not pHead2:
return pHead1
if pHead1.val <= pHead2.val:
pHead1.next = self.Merge(pHead1.next, pHead2)
return pHead1
else:
pHead2.next = self.Merge(pHead1, pHead2.next)
return pHead2