Combinations

[LeetCode]Letter Combinations of a Phone Number

题目要求如下：Givenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
zhouworld16·2020-09-16 06:00

数字组合sum 不可以重复并且去重复

Givenacollectionofcandidatenumbers(candidates)andatargetnumber(target),findalluniquecombinationsincandidateswherethecandidatenumberssumstotarget.Eachnumberincandidatesmayonlybeusedonceinthecombination
江上渔者21号·2020-09-16 03:17

Letter Combinations of a Phone Number 时间复杂度（O( k*n)）

时间复杂度（O(k*n)）classSolution{public:vectorletterCombinations(stringdigits){vectorresult;if(digits=="")returnresult
ziyue246·2020-09-16 00:38

Letter Combinations of a Phone Number 递归回溯法

17.LetterCombinationsofaPhoneNumberGivenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
大疯疯·2020-09-16 00:44

leetcode 个人刷题记录（Python）

classSolution:defcombinationSum(self,candidates:List[int],target:int)->List[List[i
粽子小黑·2020-09-16 00:54

Letter Combinations of a Phone Number

题目经典的backtracking（回溯算法）的题目。当一个题目，存在各种满足条件的组合，并且需要把它们全部列出来时，就可以考虑backtracking了。当然，backtracking在一定程度上属于穷举，所以当数据特别大的时候，不合适。而对于那些题目，可能就需要通过动态规划来完成。思路假设输入的是”23”，2对应的是”abc”，3对应的是”edf”，那么我们在递归时，先确定2对应的其中一个字母
Wannna·2020-09-15 23:45

LeetCode 17 Letter Combinations of a Phone Number 数字转为字母组合

题目：Givenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
大三狗·2020-09-15 23:05

Letter Combinations of a Phone Number（电话号码→字母组合）

题目描述：Givenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
prince谢晓峰·2020-09-15 23:04

Letter Combinations of a Phone Number（键盘字母）

原题网址：https://leetcode.com/problems/letter-combinations-of-a-phone-number/Givenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
jmspan·2020-09-15 23:09

Letter Combinations of a Phone Number可能是世界上最简明的解法了

Givenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
booirror·2020-09-15 22:12

Letter Combinations of a Phone Number - Python

问题描述：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"].说明:尽管上面的答案是按字典序排列的，但是你可以任意选择答案输出的顺序。问题分析：很显然是，是回溯题目，递归求解，可以使用深
GrowthDiary007·2020-09-15 22:52

Letter Combinations of a Phone Number

题目描述Givenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
柯森锎·2020-09-15 21:20

Python-itertools详解

将多个序列作为一个单独的序列返回，例如：importitertoolsforiteminitertools.chain("i","love","python"):printitem输出结果：ilovepythoncombinations
玉米丛里吃过亏·2020-09-15 21:46

【python 排列组合】Python实现排列组合

调用itertools获取排列组合的全部情况数#-*-encoding=utf-8-*-fromitertoolsimportcombinations,permutations#排列test_data=
开心果汁·2020-09-15 20:30

Python笔记：itertools库简介

itertools库简介1.itertools库是什么2.itertools库函数简介1.元素迭代相关1.count2.cycle3.repeat2.排列组合相关1.product2.permutations3.combinations4
アハハハ君·2020-09-15 18:15

What Does BERT Look At? An Analysis of BERT’s Attention 论文总结

文章目录往期文章链接目录BeforewestartSurface-LevelPatternsinAttentionProbingIndividualAttentionHeadsProbingAttentionHeadCombinationsClusteringAttentionHeads
Jay_Tang·2020-09-15 18:39

输出所有的合法的括号组合

Implementanalgorithmtoprintallvalid(e.g.,properlyopenedandclosed)combinationsofn-pairsofparentheses.EXAMPLE
sunmenggmail·2020-09-15 17:06

【笔试/面试】 —— 最长递增子序列

朴素版遍历+判断fromitertoolsimportcombinationsdefnaive_lis(seq):l=len(seq)forlengthinrange(l-1,0,-1):forsu
Inside_Zhang·2020-09-15 16:48

[LeetCode]problem 15. 3Sum

TAG三数和为特定值的所有可能题目链接方法首先想到了combinationsum,这样做会有重复，因为给的数组中有重复数。于是又做了一个set来去重，结果——果然TLE了。
小文件·2020-09-15 15:14

python列出集合中的所有子集（总结）

库函数forainrange(len(list1)):foriincombinations(list1,a+1):print(i)二进制位运算defPowerSetsBinary(items):N=len
Naix1573·2020-09-15 14:52

[LeetCode]22. Generate Parentheses括号生成

Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,givenn
weixin_34061482·2020-09-15 05:59

LeetCode 22 Generate Parentheses（生成括号）

一个解决方案集是："((()))","(()())","(())()","()(())","()()()"原文Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample
weixin_33840661·2020-09-15 05:21

力扣题解-77. 组合

:n=4,k=2输出:[[2,4],[3,4],[2,3],[1,2],[1,3],[1,4],]来源：力扣（LeetCode）链接：https://leetcode-cn.com/problems/combinations
amberlpp·2020-09-15 05:30

LeetCode377. Combination Sum IV

LeetCode377.CombinationSumIV题目：Givenanintegerarraywithallpositivenumbersandnoduplicates,findthenumberofpossiblecombinationsthatadduptoapositiveintegertarget.Example
mohk·2020-09-15 05:13

LeetCode解题报告 377. Combination Sum IV [medium]

题目描述Givenanintegerarraywithallpositivenumbersandnoduplicates,findthenumberofpossiblecombinationsthatadduptoapositiveintegertarget.Example
conniemessi·2020-09-15 04:36

LeetCode:377. Combination Sum IV

LeetCode:377.CombinationSumIVGivenanintegerarraywithallpositivenumbersandnoduplicates,findthenumberofpossiblecombinationsthatadduptoapositiveintegertarget.Example
Wisimer·2020-09-15 04:36

[LeetCode] Restore IP Addresses 复原IP地址

Givenastringcontainingonlydigits,restoreitbyreturningallpossiblevalidIPaddresscombinations.Forexample
weixin_34405557·2020-09-14 16:01

Leetcode Freq 3

Leetcodefreq3标签（空格分隔）：leetcodeFrequency3题解Leetcodefreq3Frequency3题解20141218Combination-N00tLetterCombinationsofaPhoneNumberCombinationSumIIIMaximumSubarrayIIIJumpGame20141217TrappingRainWaterLargestRe
纯黑老白·2020-09-14 14:21

Go实现笛卡尔积

2019独角兽企业重金招聘Python工程师标准>>>varcountIndex=len(sep)-1varcounter=make([]int,countIndex+1)varcombinations
weixin_33943836·2020-09-14 11:08

字符串解析出所有ip地址

/*givenastringcontainingonlydigits,restoreitbyreturningallpossiblevalidIPaddresscombinations.Forexample
leewon1988·2020-09-14 09:04

Python练习题答案: 整数组合的总和【难度：2级】--景越Python编程实例训练营,1000道上机题等你来挑战

整数组合的总和【难度：2级】:答案1：fromitertoolsimportcombinations_with_replacementdeffind(arr,n):returnsum(sum(c)==nforxinrange
景越·2020-09-14 06:00

【回溯】B008_组合（回溯 | 剪枝）

一、题目描述Giventwointegersnandk,returnallpossiblecombinationsofknumbersoutof1...n.Input:n=4,k=2Output:[[2,4
wdt_·2020-09-14 04:08

GraphEmbedding系列总结

GraphEmbedding系列总结Word2VecItem2VecDeepWalkNode2VecEGESLINELINEmodelfirst-orderproximitysecond-orderproximitycombinationSDNESDNE
Albert_Lee_RS·2020-09-14 04:57

leetcode-216. 组合总和 III

示例1:输入:k=3,n=7输出:[[1,2,4]]示例2:输入:k=3,n=9输出:[[1,2,6],[1,3,5],[2,3,4]]classSolution{publicList>combinationSum3
yongqi_wang·2020-09-13 21:33

216. Combination Sum III(Leetcode每日一题-2020.09.11)

ProblemFindallpossiblecombinationsofknumbersthatadduptoanumbern,giventhatonlynumbersfrom1to9canbeusedandeachcombinationshouldbeauniquesetofnumbers.Note
Bryan要加油·2020-09-13 12:04

40. Combination Sum II(Leetcode每日一题-2020.09.10)

ProblemGivenacollectionofcandidatenumbers(candidates)andatargetnumber(target),findalluniquecombinationsincandidateswherethecandidatenumberssumstotarget.Eachnumberincandidatesmayonlybeusedonceinthecomb
Bryan要加油·2020-09-13 12:04

39. Combination Sum(Leetcode每日一题-2020.09.09)

ProblemGivenasetofcandidatenumbers(candidates)(withoutduplicates)andatargetnumber(target),findalluniquecombinationsincandidateswherethecandidatenumberssumstotarget.Thesamerepeatednumbermaybechosenfrom
Bryan要加油·2020-09-13 12:04

Combinations(Leetcode每日一题-2020.09.08)

ProblemGiventwointegersnandk,returnallpossiblecombinationsofknumbersoutof1…n.Youmayreturntheanswerinanyorder.Constraints
Bryan要加油·2020-09-13 12:03

216. Combination Sum III 组合总和 III

CodedefcombinationSum3(self,k:int,n:int
Alex 007·2020-09-13 09:48

Combinations部分全排列

Giventwointegersnandk,returnallpossiblecombinationsofknumbersoutof1...n.Example:Input: n=4,k=2Output:
Heisenberg-Wong·2020-09-13 06:12

Letter Combinations of a Phone Number

题目链接：LetterCombinationsofaPhoneNumberGivenadigitstring,returnallpossiblelettercombinationsthatthenumbercouldrepresent.Amappingofdigittoletters
makuiyu·2020-09-13 05:49

【LeetCode】77.Combinations(Medium)解题报告

【LeetCode】77.Combinations(Medium)解题报告题目地址：https://leetcode.com/problems/combinations/description/题目描述
郝春雨·2020-09-13 05:43

[LeetCode 77] Combinations

题目链接：combinations相似题型：1.[LeetCode39&40]CombinationSumI&II2.[LeetCode78]Subsets3.
xiaoo_gan·2020-09-13 05:48

组合（combinations）（回溯）[中等]

链接https://leetcode-cn.com/problems/combinations/耗时解题：13min题解：5min题意给定两个整数n和k，返回1…n中所有可能的k个数的组合。
Krone_·2020-09-13 04:44

Combinations 组合

Leetcode77.Combinations组合标签：Leetcode题目地址：https://leetcode-cn.com/problems/combinations/题目描述给定两个整数n和k，
coderwangson·2020-09-13 04:57

Combinations 组合

Giventwointegersnandk,returnallpossiblecombinationsofknumbersoutof1...n.Example:Input: n=4,k=2Output:
别说话写代码·2020-09-13 04:56

Scala 数组、集合函数大全（史上最全）

集合函数大全Array++++:+::+/::\addString(b)addString(b,sep)aggregateapplycanEqualcharAtclonecollectcollectFirstcombinationscontainscontainsSlicecopyToArray
GodSuzzZ·2020-09-13 04:06

Python基础语法笔记整理

文章目录一.常用函数choice()combinations()count()Counter()defaultdict()deque()enumerate()eval()filter(),zip(),map
辉比寻常·2020-09-13 03:28

LeetCode(二)DFS+回溯专题

LeetCode17.LetterCombinationsofaPhoneNumber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）。
WMXNLFD·2020-09-12 23:53

[Leetcode][第39题][JAVA][组合总和][回溯][dfs][剪枝]

importjava.util.ArrayList;importjava.util.Deque;importjava.util.List;publicclassSolution{publicList>combinationSum
CryptWinter·2020-09-12 22:42
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