剑指offer 面试25题

# -*- 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
        elif not pHead2:
            return pHead1
        pMergedHead=None
        if (pHead1.val<pHead2.val):
            pMergedHead=pHead1
            pMergedHead.next=self.Merge(pHead1.next,pHead2)
        else:
            pMergedHead=pHead2
            pMergedHead.next=self.Merge(pHead1,pHead2.next)
            
        return pMergedHead