题解 | #链表中倒数最后k个结点#
链表中倒数最后k个结点
https://www.nowcoder.com/practice/886370fe658f41b498d40fb34ae76ff9
/**
* 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
int n = - k;
struct ListNode* nHead = pHead;
while (nHead != NULL) {
n++;
nHead = nHead->next;
}
if (n < 0) {
return NULL;
}
while (pHead != NULL) {
if (n <= 0) {
break;
}
n--;
pHead = pHead->next;
}
return pHead;
}
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