题解 | #两个链表的第一个公共结点#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 */

/**
 * 
 * @param pHead1 ListNode类 
 * @param pHead2 ListNode类 
 * @return ListNode类
 */
struct ListNode* FindFirstCommonNode(struct ListNode* pHead1, struct ListNode* pHead2 ) {
    // write code here
    struct ListNode* p = pHead1;
    struct ListNode* q = pHead2;
    while(p != q)
    {
        p = p ? p->next:pHead2;
        q = q ? q->next:pHead1;
    }
    return p;
}