Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s. If yo…

统计有几种邮箱地址. 邮箱名类型:local@domain 规则:1. local中出现"."的,忽略. a.bc=abc 2. local中出现"+"的,+以及之后的local全部忽略. a+bc=a 思路: 利用set存,水题没啥好说的 Runtime: 20 ms, faster than 96.66% of C++ online submissions for Unique Email Addresses. class Solution { public:…

929. Unique Email Addresses Easy 22766FavoriteShare Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase l…

problem 929. Unique Email Addresses solution: class Solution { public: int numUniqueEmails(vector<string>& emails) { unordered_set<string> tmp; for(auto email:emails) { std::size_t at = email.find('@'); string local = ""; ; i<…

Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s. If yo…

Description Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or…

题目要求 Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. If you add periods ('.') between some characters in the local name…

Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s. If yo…

题目如下: Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s.…

Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s. If yo…

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 set + 字符串操作 参考资料 日期 题目地址:https://leetcode.com/problems/unique-email-addresses/description/ 题目描述 Every email consists of a local name and a domain name, separated by the @ sign.…

这道题是LeetCode里的第929道题. 题目要求: 每封电子邮件都由一个本地名称和一个域名组成,以 @ 符号分隔. 例如,在 alice@leetcode.com中, alice 是本地名称,而 leetcode.com 是域名. 除了小写字母,这些电子邮件还可能包含 '.' 或 '+'. 如果在电子邮件地址的本地名称部分中的某些字符之间添加句点('.'),则发往那里的邮件将会转发到本地名称中没有点的同一地址.例如,"alice.z@leetcode.com" 和 "al…

题目标签:String 题目说明 有两个规则针对于 local name. 所以先把local name 和 domain name 分开. 两个规则是: rule 1:'.' 会被去除. (利用replace 把 '.' 换成 '') rule 2:'+' 之后的所有东西都会被 去除.(利用substring 把 '+' 之后的去除) Java Solution: Runtime beats 34.05% 完成日期:12/08/2018 关键点:substring 和 replace clas…

这是悦乐书的第356次更新,第383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218题(顺位题号是927).每封电子邮件都包含本地名称和域名,以@符号分隔. 例如,在alice@leetcode.com中,alice是本地名称,leetcode.com是域名. 除了小写字母,这些电子邮件可能包含'.'或'+'. 如果在电子邮件地址的本地名称部分中的某些字符之间添加句点('.'),则在那里发送的邮件将转发到本地名称中没有点的同一地址.例如,"alice.z@lee…

1.题目描述 2.问题分析 将字符串中的 ‘.’ 去掉,将 ‘+’后面直到‘@’的字符串去掉,然后利用set的特性. 3.代码 int numUniqueEmails(vector<string>& emails) { || emails.size() == ) return emails.size(); set<string> se; for (vector<string>::iterator it = emails.begin(); it != emails…

Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s. If yo…

Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these emails may contain '.'s or '+'s. If yo…

每封电子邮件都由一个本地名称和一个域名组成,以 @ 符号分隔. 例如,在 alice@leetcode.com中, alice 是本地名称,而 leetcode.com 是域名. 除了小写字母,这些电子邮件还可能包含 ',' 或 '+'. 如果在电子邮件地址的本地名称部分中的某些字符之间添加句点('.'),则发往那里的邮件将会转发到本地名称中没有点的同一地址.例如,"alice.z@leetcode.com" 和 "alicez@leetcode.com" 会转发到…

929. Unique Email Addresses (Easy)# Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name, and leetcode.com is the domain name. Besides lowercase letters, these em…

Question 929. Unique Email Address Solution 题目大意: 给你一个邮箱地址的数组,求出有多少个不同的地址,其中localName有如下规则 加号(+)后面的字符及加号忽略 点(.)也忽略 思路: 直接遍历,字符串操作即可 Java实现: public int numUniqueEmails(String[] emails) { if (emails == null || emails.length == 0) { return 0; } Set<Stri…

Unique Paths II Total Accepted: 31019 Total Submissions: 110866My Submissions Question Solution  Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty spa…

LeetCode:Unique Binary Search Trees Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 分析:依次把每个节点作…

Consider the string s to be the infinite wraparound string of "abcdefghijklmnopqrstuvwxyz", so s will look like this: "...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....". Now we have another string p. Your job is to find…

An abbreviation of a word follows the form <first letter><number><last letter>. Below are some examples of word abbreviations: a) it --> it (no abbreviation) 1 b) d|o|g --> d1g 1 1 1 1---5----0----5--8 c) i|nternationalizatio|n --&…

Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 这道题实际上是Catalan Number卡塔兰数的一个例子,如果对卡塔兰数不熟悉的童鞋可能真…

Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example,Given n = 3, your program should return all 5 unique BST's shown below. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 confused what "{1,#,2…

Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the middl…

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in t…

Title: https://leetcode.com/problems/unique-paths/ A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bo…

原题地址:https://oj.leetcode.com/problems/unique-paths-ii/ 题意: Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively i…