题目: You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the two num…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 先求和再构成列表 使用栈保存节点数字 类似题目 日期 题目地址:https://leetcode.com/problems/add-two-numbers-ii/description/ 题目描述 You are given two non-empty linked lists representing two non-negative intege…

You are given two non-empty linked lists representing two non-negative integers. The most significant digit comes first and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the two numbers…

题目: You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input: (2 -> 4 -> 3) + (5 -> 6 -&…

首先想到的是走到其中一个链表的尽头,然后把剩余的链表中的值放入写的链表,返回,但是自己写的代码好长. struct ListNode* addTwoNumbers(struct ListNode* l1, struct ListNode* l2) { ,stmp; struct ListNode *pl,*ptmp,*pi; pl=NULL; while(l1&&l2) { g=l1->val+l2->val; g+=s; stmp=g/; g%=; struct ListNo…

给出两个 非空 的链表用来表示两个非负的整数.其中,它们各自的位数是按照 逆序 的方式存储的,并且它们的每个节点只能存储 一位 数字. 如果,我们将这两个数相加起来,则会返回一个新的链表来表示它们的和. 您可以假设除了数字 0 之外,这两个数都不会以 0 开头. 示例: 输入:(2 -> 4 -> 3) + (5 -> 6 -> 4) 输出:7 -> 0 -> 8 原因:342 + 465 = 807 分析思路:输入两个链表,输出一个链表.则需要新建一个链表,把输入的两…

[LeetCode]165. Compare Version Numbers 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/compare-version-numbers/description/ 题目描述: Compare two version numbers version1 and vers…

[LeetCode]623. Add One Row to Tree 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/add-one-row-to-tree/description/ 题目描述: Given the root of a binary tree, then value v and depth d, you need to add a row of nodes with value v at the…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 数组转整数再转数组 模拟加法 日期 题目地址:https://leetcode.com/problems/add-to-array-form-of-integer/ 题目描述 For a non-negative integer X, the array-form of X is an array of its digits in left to r…

一天一道leetcode系列 (一)题目: You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input: (2 -> 4 ->…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 方法一:递归 方法二:减1模9 方法三:直接模9 日期 [LeetCode] 题目地址:https://leetcode.com/problems/add-digits/ Total Accepted: 33351 Total Submissions: 71187 Difficulty: Easy 题目描述 Given a non-negative…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 [LeetCode] 题目地址:https://leetcode.com/problems/add-strings/ Difficulty: Easy 题目描述 Given two non-negative integers num1 and num2 represented as string, return the sum of num1…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 BigInteger类 模拟加法 日期 题目地址:https://leetcode.com/problems/add-binary/description/ 题目描述 Given two binary strings, return their sum (also a binary string). The input strings are bot…

Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. 思路: 先找前面二进制相同的位,后面不相同的位相与一定为0. 比如: 1111001 1110011 从0011 - 1001 中间一定会经…

Add Digits 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…

Compare two version numbers version1 and version2.If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0. You may assume that the version strings are non-empty and contain only digits and the . character.The . characte…

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 without…

problem 448. Find All Numbers Disappeared in an Array solution: class Solution { public: vector<int> findDisappearedNumbers(vector<int>& nums) { vector<int> res; ; i<nums.size(); i++) { ; nums[tmp] = nums[tmp]> ? -nums[tmp] : n…

problem 415. Add Strings solution: class Solution { public: string addStrings(string num1, string num2) { ; ; ; string res = ""; || j>= || carry) { )?:(num1[i--]-)?:(num2[j--]-')) + carry;//注意运算符的优先级顺序. carry = tmp/; res = to_string(tmp%) + r…

Add and Search Word - Data structure design Design a data structure that supports the following two operations: void addWord(word) bool search(word) search(word) can search a literal word or a regular expression string containing only letters a-z or …

题目如下: 小A 和 小B 在玩猜数字.小B 每次从 1, 2, 3 中随机选择一个,小A 每次也从 1, 2, 3 中选择一个猜.他们一共进行三次这个游戏,请返回 小A 猜对了几次? 输入的guess数组为 小A 每次的猜测,answer数组为 小B 每次的选择.guess和answer的长度都等于3. 示例 1: 输入:guess = [1,2,3], answer = [1,2,3]输出:3解释:小A 每次都猜对了. 示例 2: 输入:guess = [2,2,3], answer = […

题目如下: Given the root of a binary tree, then value v and depth d, you need to add a row of nodes with value v at the given depth d. The root node is at depth 1. The adding rule is: given a positive integer depth d, for each NOT null tree nodes N in de…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 方法一:暴力求解 方法二:原地变负做标记 方法三:使用set 日期 [LeetCode] 题目地址:https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/ Total Accepted: 14302 Total Submissions: 24993 Difficulty:…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 遍历 日期 题目地址:https://leetcode-cn.com/problems/add-bold-tag-in-string/ 题目描述 Given a string s and a list of strings dict, you need to add a closed pair of bold tag <b> and </b&g…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 循环 filter函数 数字迭代 日期 题目地址:https://leetcode.com/problems/self-dividing-numbers/description/ 题目描述 A self-dividing number is a number that is divisible by every digit it contains.…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 公众号:负雪明烛 本文关键词:Leetcode, 力扣,211,搜索单词,前缀树,字典树,Trie,Python, C++, Java 目录 题目描述 题目大意 解题思路 从二叉树说起 前缀树 构建 查询 应用 代码 刷题心得 日期 题目地址:https://leetcode.com/problems/add-and-search-word-data-structure-design/…

题目: Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return "100". 提示: 此题我的第一反应是把输入的两个字符串转化为数字,相加以后再把结果转化为二进制输出,但是测试用例中会有很大的输入,此时即使是long long型也会造成溢出,所以只能用最传统的由低位到高位逐位相加的方法去做. 代码: c…

题目如下: For a non-negative integer X, the array-form of X is an array of its digits in left to right order.  For example, if X = 1231, then the array form is [1,2,3,1]. Given the array-form A of a non-negative integer X, return the array-form of the in…

题目如下: 解题思路:这题看起来和[leetcode]448. Find All Numbers Disappeared in an Array很相似,但是有几点不同:一是本题的输入存在负数,二是没有约定输入元素的最大值.那么,怎么可以把本题转换成448题的场景呢?首先,我们可以求出输入数组nums中所有正整数的数量,记为p,那么显然能得出这个结论:1 <=answer < p+1.然后,我们可以通过交换把所有值不在这个区间内的元素值移动到数组的后半部分.记nums前半部分[0:length]…

[LeetCode]129. Sum Root to Leaf Numbers 解题报告(Python) 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/sum-root-to-leaf-numbers/description/ 题目描述: Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a numbe…