题解 | #两个链表的第一个公共结点#
两个链表的第一个公共结点
https://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46
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) { if(pHead1 == null || pHead2 == null) { return null; } ListNode listNode1 = new ListNode(0); listNode1.next = pHead1; ListNode listNode2 = new ListNode(0); listNode2.next = pHead2; List<ListNode> list = new ArrayList<>(); while(listNode1.next != null) { listNode1 = listNode1.next; list.add(listNode1); } while(listNode2.next != null) { listNode2 = listNode2.next; if(list.contains(listNode2)) { return listNode2; } } return null; } }