题解 | #链表中倒数最后k个结点#
链表中倒数最后k个结点
http://www.nowcoder.com/practice/886370fe658f41b498d40fb34ae76ff9
/**
* struct ListNode {
* int val;
* struct ListNode *next;
* };
*
* C语言声明定义全局变量请加上static,防止重复定义
*/
/**
* 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 ) {
struct ListNode *fast, *slow;
fast = slow = pHead;
while(k--)
{
if(fast == NULL)
return NULL;
fast = fast->next;
}
while(fast)
{
slow = slow->next;
fast = fast->next;
}
return slow;
}