题解 | #链表中倒数最后k个结点#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 */
/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 * 
 * @param pHead ListNode类 
 * @param k int整型 
 * @return ListNode类
 */
struct ListNode* FindKthToTail(struct ListNode* pHead, int k ) {
    // write code here
    struct ListNode* fast;
    struct ListNode* solw;
    fast = pHead;
    solw = pHead;
    while(k-- > 0)
    {
        if(fast == NULL)
        {
            return NULL;
        }
        fast = fast->next;
    }
    while (fast)
    {
        fast = fast->next;
        solw = solw->next;
    }
    return solw;
}