两个链表的第一个公共节点

public class Solution {
    public ListNode FindFirstCommonNode(ListNode pHead1, ListNode pHead2) {
        ListNode l1 = pHead1,l2=pHead2;
        while(l1 != l2){
            l1 = (l1==null)?pHead2:l1.next;
            l2 = (l2==null)?pHead1:l2.next;
        }
        return l1;
 
    }
}