一、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。
二、代码实现
# -*- 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 pHead1 == None: return pHead2
if pHead2 == None: return pHead1
resHead = resNode = ListNode(-1)
while pHead1 and pHead2:
if pHead1.val < pHead2.val:
resNode.next = pHead1
pHead1 = pHead1.next
else:
resNode.next = pHead2
pHead2 = pHead2.next
resNode = resNode.next
if pHead1: resNode.next = pHead1
if pHead2: resNode.next = pHead2
return resHead.next
