源代码地址:https://github.com/hopebo/hopelee 语言:C++ 517. Super Washing Machines You have n super washing machines on a line. Initially, each washing machine has some dresses or is empty. For each move, you could choose any m (1 ≤ m ≤ n) washing machines,…
源代码地址:https://github.com/hopebo/hopelee 语言:C++ 24.Swap Nodes in Pairs Given a linked list, swap every two adjacent nodes and return its head. For example,Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should u…
1 LeetCode是什么? LeetCode是一个在线的编程测试平台,国内也有类似的Online Judge平台.程序开发人员可以通过在线刷题,提高对于算法和数据结构的理解能力,夯实自己的编程基础.对于找工作的小伙伴十分有好处. 这是leetcode官网的简介: LeetCode OJ is a platform for preparing technical coding interviews. Pick from an expanding library of more than 190 …
645. Set Mismatch The set S originally contains numbers from 1 to n. But unfortunately, due to the data error, one of the numbers in the set got duplicated to another number in the set, which results in repetition of one number and loss of another nu…
源代码地址:https://github.com/hopebo/hopelee 语言:C++ 301. Remove Invalid Parentheses Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other tha…
问题描述 Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 和Balanced Binary Tree那题很像.定义T(p)为以p为根的树,T(p) = T(q)需要符合两个条件:…
问题描述 Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should become 1 -> 2…
标题 Maximum Depth of Binary Tree 描述 The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. c++实现方法代码 1.递归实现,时间复杂度为O(n) 空间复杂度为O(logn) /** * Definition for binary tree * struct TreeNode { * int…
题目: Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is like: 3 + 8 = 11, 1 + 1 = 2. Since 2 has only one digit, return it. Follow up: Could you do it withou…
问题描述 Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the majority element always exist in the array. 解决思路: 推荐算法: Moore votin…
转自https://leetcode-cn.com/ 1.两数之和 给定一个整数数组 nums 和一个目标值 target,请你在该数组中找出和为目标值的那 两个 整数,并返回他们的数组下标. 你可以假设每种输入只会对应一个答案.但是,你不能重复利用这个数组中同样的元素. class Solution { public static int[] twoSum(int[] nums, int target) { int[] res = new int[2]; for(int i = 0;i<num…
题目:Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remain as it is. You may not alter the values in the nodes, only…
问题描述如下: Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Follow up: Can you solve it without using extra space? 从问题来看,如果可以充分利用额外空间的话,这个题目是不难的,然而题目提出了一个要求,能否在不使用任何额外空间的情况下解决这个问题. 通过反复思考,我觉得这题类似于追击问题,可以用一个…
================================== LeetCode的一些算法题,都是自己做的,欢迎提出改进~~ LeetCode:http://oj.leetcode.com ================================== <Reverse Words in a String>-20140328 Given an input string, reverse the string word by word. For example, Given s =…
