Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following two linked lists: A: a1 → a2 ↘ c1 → c2 → c3 ↗ B: b1 → b2 → b3 begin to intersect at node c1. 找出第一个合并的节点的位置(或者说插入),注意复杂度为O(N),那么先遍…