这道题是我刷leetcode遇到的第一个难度为Hard的题,笔者在大学学习算法课的时候接触过类似的题目,不过由于时间久了,加之当时并没有对这类题型有一个深刻的理解,所以忘了做法了。在查阅了一些技术类博客之后,才找回了当时…
分类:LeetCode
Leetcode #41 First Missing Positive
public class Solution { public int firstMissingPositive(int[] nums) { int len = nums.length; for(int i=0;i<…
LeetCode算法题-Move Zeroes(Java实现-三种解法)
这是悦乐书的第201次更新,第211篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第67题(顺位题号是283)。给定一个数组nums,写一个函数将所有0移动到它的末尾,同时保持非零元素的相对…
328. Odd Even Linked List
Medium Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here w…
LeetCode刷题之Remove Duplicates from Sorted Array
Problem Given a sorted array, remove the duplicates in place such that each element appear only once and retur…
80. Remove Duplicates from Sorted Array II
80. Remove Duplicates from Sorted Array II 题目 Follow up for "Remove Duplicates": What if duplicates are allowe…
[LeetCode] Permutation Sequence 序列排序
The set [1,2,3,...,n] contains a total of n! unique permutations. By listing and labelin…
[LeetCode] Count of Smaller Numbers After Self 计算后面较小数字的个数
You are given an integer array nums and you have to return a new counts array. The&…
[LeetCode] Longest Word in Dictionary 字典中的最长单词
Given a list of strings words representing an English Dictionary, find the longest word in&nb…
【leetcode】94. Binary Tree Inorder Traversal 二叉树的中序遍历
1. 题目 Given a binary tree, return the inorder traversal of its nodes’ values. For example:Given binary t…
【leetcode】60. Permutation Sequence 全排列的第k位序的排列形式
1. 题目 The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permu…
力扣(LeetCode)155
题目地址:https://leetcode-cn.com/probl…题目描述:设计一个支持 push,pop,top 操作,并能在常数时间内检索到最小元素的栈。 push(x) — 将元素 x …