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:…

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…

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…

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…

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<…

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.…

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…

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…

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…

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…

leetcode - 35. Search Insert Position - Easy descrition Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order. You may assume no duplicates in the arr…

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…

Given an integer n, generate all structurally unique BST's (binary search trees) that store values 1 ... n. Input: 3 Output: [ [1,null,3,2], [3,2,null,1], [3,1,null,null,2], [2,1,3], [1,null,2,null,3] ] Explanation: The above output corresponds to th…

Unique Binary Search Trees II leetcode java [LeetCode]Unique Binary Search Trees II 异构二叉查找树II Unique Binary Search Trees II -- LeetCode 描述 Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example,Give…

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. 解题思路: 参考Java for LeetCode 096 Unique Binary Search Trees思路,本题很容易解决.注意,…

索引:[LeetCode] Leetcode 题解索引 (C++/Java/Python/Sql) Github: https://github.com/illuz/leetcode 038. Count and Say (Easy) 链接: 题目:https://leetcode.com/problems/Count-and-Say/ 代码(github):https://github.com/illuz/leetcode 题意: 数数.第一个是 1,第二个是数前一个数:1 个 1,就是 11…

题目: 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'…

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…

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…

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 此题是卡塔兰数的一个应用.注意是BST而不是普通的Binary Tree,所以要满足左比根小,…