题解 | #链表中倒数第k个结点#

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

/**
 * 
 * @param pListHead ListNode类 
 * @param k int整型 
 * @return ListNode类
 */
struct ListNode* FindKthToTail(struct ListNode* pListHead, int k ) {

    struct ListNode* slow = pListHead, *fast = pListHead;
    int count = k;
    while(count--)
    {
        if(fast ==NULL)
            return NULL;
        fast = fast->next;
    }
 
    while(fast)
    {
        fast = fast->next;
        slow = slow->next;
    }
    return slow;
    // write code here
}