import java.util.*; /* public class ListNode { int val; ListNode next = null; ListNode(int val) { this.val = val; } }*/ public class Solution { public ListNode FindFirstCommonNode(ListNode pHead1, ListNode pHead2) { // 左程云老师讲过这道题。分别测量两条链表的长度length1和length2,计算二者的差...