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…
题目 电话号码的字母组合 给一个数字字符串,每个数字代表一个字母,请返回其所有可能的字母组合. 下图的手机按键图,就表示了每个数字可以代表的字母. 样例 给定 "23" 返回 ["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"] 注意 以上的答案是按照词…
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 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 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…
给定一个数字字符串,返回数字所有可能表示的字母组合. 输入:数字字符串 "23"输出:["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"]. 详见:https://leetcode.com/problems/letter-combinations-of-…
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…
Problem: 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&…
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…
题意:给一个电话号码,要求返回所有在手机上按键的组合,组合必须由键盘上号码的下方的字母组成. 思路:尼玛,一直RE,题意都不说0和1怎么办.DP解决. class Solution { public: vector<string> ans; string str; void DFS(const string sett[], int siz, string t ) { '; if(siz==str.size()){ans.push_back( t );return ;} ; i<sett[…
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…
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…
乘风破浪:LeetCode真题_017_Letter Combinations of a Phone Number 一.前言 如何让两个或者多个集合中的随机挑选的元素结合到一起,并且得到所有的可能呢?我们可能事先并不知道会用到哪几个集合,因此我们可以通过递归方法来解决. 二.Letter Combinations of a Phone Number 2.1 问题 2.2 分析和解决 通过上面的题目,我们基本上可以理解题意了,但是我们要怎么去处理呢,这个时候就需要用到递归算法了. public c…
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…
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…
# -*- 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…
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…
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…
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 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…
[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…
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…
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…
题目: 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"…
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…