goden0202

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Published: Aug 9, 2023 License: GPL-3.0 Imports: 2 Imported by: 0

README

面试题 02.02.返回倒数第 k 个节点

1. 题目描述

实现一种算法,找出单向链表中倒数第 k 个节点。返回该节点的值。

注意: 本题相对原题稍作改动

示例:

输入: 1->2->3->4->5 和 k = 2
输出: 4

说明:

给定的 k 保证是有效的。

标签 链表 双指针

2. 解题

  1. 双指针法 p, q两指针距离为k,当q走到nil, p指向的节点即为要返回节点

  2. 递归法

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type ListNode

type ListNode struct {
	Val  int
	Next *ListNode
}

func BuildCircleListWithNoHead

func BuildCircleListWithNoHead(list []int, cursor int) *ListNode

BuildCircleListWithNoHead build a circle list, which tail point to list[cursor]

func BuildListWithHead

func BuildListWithHead(data []int) *ListNode

func BuildListWithNoHead

func BuildListWithNoHead(nums []int) *ListNode

func (*ListNode) HasCycle

func (l *ListNode) HasCycle() (bool, *ListNode)

HasCycle check if linklist has cycle structure, if not, return false, nil, if yes, return true and the cycle start node

func (*ListNode) Index

func (l *ListNode) Index(target int) *ListNode

Index return the node which value equals target

func (*ListNode) Len

func (l *ListNode) Len() int

Len return list length, when list has cycle structure, return -1

func (*ListNode) Slice

func (l *ListNode) Slice() []int

Slice return slice which contains all node's values in order.

func (*ListNode) String

func (l *ListNode) String() string

String implements Stringer interface.

func (*ListNode) Tail

func (l *ListNode) Tail() *ListNode

Tail return last list node

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