题解 | #两个链表的第一个公共结点#

# class ListNode:
#     def __init__(self, x):
#         self.val = x
#         self.next = None

#
# 
# @param pHead1 ListNode类 
# @param pHead2 ListNode类 
# @return ListNode类
#
class Solution:
    def FindFirstCommonNode(self, pHead1, pHead2):
        l1 = pHead1
        l2 = pHead2
        while l1 != l2:
            l1 = l1.next if l1 else pHead2
            l2 = l2.next if l2 else pHead1
        return l1