剑指offer 22. 链表中倒数第k个节点-爱代码爱编程
链表中倒数第k个节点
高频题
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* getKthFromEnd(ListNode* head, int k) {
ListNode* tmp = head;
int sum = 0 , num = 0;
while(tmp != nullptr)
{
sum++;
tmp = tmp->next;
}
num = sum - k;
tmp = head;
while(num--)
tmp = tmp->next;
return tmp;
}
};