# 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 ): # write code here if not pHead1 or not pHead2: return None p1,p2 = pHead1,pHead2 while p1 != p2: ...