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
/*class ListNode {
* val: number
* next: ListNode | null
* constructor(val?: number, next?: ListNode | null) {
* this.val = (val===undefined ? 0 : val)
* this.next = (next===undefined ? null : 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
*/
export function FindKthToTail(pHead: ListNode, k: number): ListNode {
// write code here
let fast = pHead, slow = pHead
while(k-- > 0) {
if(!fast) return null
fast = fast.next
}
while(fast) {
fast = fast.next
slow = slow.next
}
return slow
}