[Leetcode]17. 电话号码的字母组合(Letter Combinations of a Phone Number) 题目描述: 给定一个仅包含数字 2-9 的字符串,返回所有它能表示的字母组合. 给出数字到字母的映射如下(与电话按键相同).注意 1 不对应任何字母. 示例: 输入:"23"输出:["ad", "ae", "af", "bd", "be", "bf&qu…

Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.…

［抄题］: Given a digit string excluded 01, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. 给定 "23" 返回 ["ad", "ae", "…

17. 电话号码的字母组合 给定一个仅包含数字 2-9 的字符串,返回所有它能表示的字母组合. 给出数字到字母的映射如下(与电话按键相同).注意 1 不对应任何字母. 示例: 输入:"23" 输出:["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"].…

题目:最长公共前缀 难度:EASY 题目内容: Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

题目描述 给定一个仅包含数字 2-9 的字符串,返回所有它能表示的字母组合. 给出数字到字母的映射如下(与电话按键相同).注意 1 不对应任何字母. 示例: 输入:"23" 输出:["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"]. 说明: 尽管上面的…

题目 给定一个仅包含数字 2-9 的字符串,返回所有它能表示的字母组合. 给出数字到字母的映射如下(与电话按键相同).注意 1 不对应任何字母. 示例: 输入:"23" 输出:["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"]. 说明: 尽管上面的答案…

描述 给定一个仅包含数字 2-9 的字符串,返回所有它能表示的字母组合. 给出数字到字母的映射如下(与电话按键相同).注意 1 不对应任何字母. 示例: 输入:"23"输出:["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"].说明:尽管上面的答案是按字…

题目描述:https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number/ 题目描述: 给定一个仅包含数字 2-9 的字符串,返回所有它能表示的字母组合. 给出数字到字母的映射如下(与电话按键相同).注意 1 不对应任何字母. 示例: 输入:"23" 输出:["ad", "ae", "af", "bd", "be&quo…

与子集70?类似,子集每次两个分支,本题每次k个分支,子集是第一次不push第二次push元素,本题是每次都push元素,因此,本题答案的长度都为k,子集题目为各种组合: /** res,level,nums,i,dict **/ class Solution { public: vector<string> letterCombinations(string digits) { len=digits.length(); ) return {}; //字母转化为数字 ;i<len;i++…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 17: Letter Combinations of a Phone Numberhttps://oj.leetcode.com/problems/letter-combinations-of-a-phone-number/ Given a digit string, return all possible letter combinations that the numbe…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Notice Although the above answer is in lexicographical order, your answe…

我现在在做一个叫<leetbook>的免费开源书项目,力求提供最易懂的中文思路,目前把解题思路都同步更新到gitbook上了,需要的同学可以去看看 书的地址:https://hk029.gitbooks.io/leetbook/ 017. Letter Combinations of a Phone Number[M] 问题 Given a digit string, return all possible letter combinations that the number could r…

17. Letter Combinations of a Phone Number Medium Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given…

1.  Container With Most Water Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two lines, which togethe…

目录 题目链接 注意点 解法 小结 题目链接 Letter Combinations of a Phone Number - LeetCode 注意点 可以不用按字典序排序 解法 解法一:输入的数字逐个处理,在已经生成的字符串后面追加该当前数字对应的所有字符.时间复杂度为O(n) class Solution { public: vector<string> letterCombinations(string digits) { vector<string> ans,temp_an…

Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23"Output…

一.题目说明 题目17. Letter Combinations of a Phone Number,题目给了下面一个图,输入一个字符串包括2-9,输出所有可能的字符组合. 如输入23所有可能的输出: "ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf" 二.我的做法 这个题目…

Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Outpu…

Letter Combinations of a Phone Number: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Outp…

Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Outpu…

Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Outpu…

leetcode-algorithms-17 Letter Combinations of a Phone Number Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone butto…

Letter Combinations of a Phone NumberMedium Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given belo…

Given a string containing digits from 2-9inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters. E…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 个人公众号:负雪明烛 本文关键词:电话号码, 字母组合,回溯法,题解,leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 回溯法 内置函数 循环 日期 题目地址:https://leetcode.com/problems/generate-parentheses/description/ 题目描述 Given a string contain…

Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…