class Solution: def FindFirstCommonNode(self , pHead1 , pHead2 ): p1, p2 = pHead1, pHead2 while p1 != p2: p1 = pHead2 if p1 is None else p1.next p2 = pHead1 if p2 is None else p2.next return p2 解题思路:设 A 的长度为 a + c,B 的长度为 b + c,其中 c 为尾部公共部分长度,可知 a +...