shortest

@codeforces - 1205B@ Shortest Cycle

目录@description@@solution@@acceptedcode@@details@@description@给定一个长度为n的正整数序列a1,a2,...,an。考虑建一张n个点的图。假如aiANDaj≠0，则在i,j之间连无向边。求在这张图上的最小环。Input第一行一个整数n表示序列长度(1≤n≤10^5)第二行包含n个整数a1,a2,…,an(0≤ai≤10^18)。Outpu
Tiw_Air_OAO·2019-08-23 19:00

LeetCode-python 214.最短回文串

[题目链接](https://leetcode-cn.com/problems/shortest-palindrome/难度：困难类型：字符串给定一个字符串s，你可以通过在字符串前面添加字符将其转换为回文串
wzNote·2019-08-23 19:56

CF1206(Div.2)D Shortest Cycle

题目传送门当时打cf的时候前面3题都做得飞快（虽然T3的结论没有严谨证明，但是前面3题都直接过PP，最后AC的结果到D题就干不动了如果只是个裸的最短环的话，还比较好办，但是这题数据范围太大，挨个枚举点相与来判断两点之间有没有边的话，建图都会超时。下不了手[无奈.jpg]最后还是大佬一语点醒了梦中人，好吧，这道题需要一个结论（怎么又是结论，我最不擅长结论了嘤嘤嘤）：如果，某一位上为1的数不小于3个，
杏花疏影里_吹笛到天明·2019-08-20 17:59

干货 | 列生成VRPTW子问题ESPPRC（ Elementary shortest path problem with resource constraints）介绍附C++代码

00前言各位小伙伴大家好，相信大家已经看过前面columngeneration求解vehicleroutingproblems的过程详解。该问题中，子问题主要是找到一条reducedcost最小的合法路径，然后加入到MasterProblem中。其实，子问题也是一个著名的NP-Hard问题，今天我们就来介绍一下。01ESPPRC考虑图1.1中描述的网络。除了每条边的成本c_ij之外，还存在经过边（
短短的路走走停停·2019-08-19 20:00

CF 1206D - Shortest Cycle Floyd求最小环

ShortestCycle题意有n(n#include#include#include#include#include#include#include#include#include#include#include#include#include#include#include#include#include#include//#include//usingnamespace__gnu_pbds;
ckxkexing·2019-08-19 19:00

581 Shortest Unsorted Continuous Subarray

Givenanintegerarray,youneedtofindonecontinuoussubarraythatifyouonlysortthissubarrayinascendingorder,thenthewholearraywillbesortedinascendingorder,too.Youneedtofindtheshortestsuchsubarrayandoutputitsle
烟雨醉尘缘·2019-08-14 17:20

581 Shortest Unsorted Continuous Subarray

Givenanintegerarray,youneedtofindonecontinuoussubarraythatifyouonlysortthissubarrayinascendingorder,thenthewholearraywillbesortedinascendingorder,too.Youneedtofindtheshortestsuchsubarrayandoutputitsle
烟雨醉尘缘·2019-08-14 17:20

Shortest Subarray with Sum at Least K 和至少为K的最短子数组

Returnthelengthoftheshortest,non-empty,contiguoussubarrayofAwithsumatleastK.Ifthereisnonon-emptysubarraywithsumatleastK,return-1.Example1:Input:A=[1],K=1Output:1Example2:Input:A=[1,2],K=4Output:-1Exam
Grandyang·2019-08-04 22:00

[C/C++] 1046 Shortest Distance (20 分)

1046ShortestDistance(20分)Thetaskisreallysimple:givenNexitsonahighwaywhichformsasimplecycle,youaresupposedtotelltheshortestdistancebetweenanypairofexits.InputSpecification:Eachinputfilecontainsonetestc
dulongxiang·2019-07-28 17:07

Shortest Path to Get All Keys 获得所有钥匙的最短路径

Wearegivena2-dimensionalgrid."."isanemptycell,"#"isawall,"@"isthestartingpoint,("a","b",...)arekeys,and("A","B",...)arelocks.Westartatthestartingpoint,andonemoveconsistsofwalkingonespaceinoneofthe4car
Grandyang·2019-07-20 23:00

Shortest Subarray with Sum at Least K

Returnthelengthoftheshortest,non-empty,contiguoussubarrayofAwithsumatleastK.Ifthereisnonon-emptysubarraywithsumatleastK,return-1.Example1:Input:A=[1],K=1Output:1Example2:Input:A=[1,2],K=4Output:-1Exam
永远的EMT·2019-06-30 23:03

算法 - 图的实例 - 最短路径 (Shortest Path)

算法-图的实例-最短路径(ShortestPath)返回分类：全部文章>>基础知识返回上级：编程基础-图(Graph)本文将介绍最短路径的基础知识，并用C++实现迪杰斯特拉算法(Dijkstra)和弗洛伊德算法(Floyed)。在查看本文之前，需要一些数据结构和程序语言的基础。尤其是“矩阵”、“矩阵的压缩(matrix)”、“图(graph)”等的知识。文章目录算法-图的实例-最短路径(Short
沙沙的兔子·2019-05-26 15:42

Leetcode Shortest Subarray with Sum at Least K(区间和大于k的最小区间)

Linkhttps://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/DescriptionProblemStatement Returnthelengthoftheshortest
yug9u·2019-05-18 15:05

【计算机网络】OSPF(Open Shortest Path First开放式最短路径优先)协议

1.区域划分:划分区域可以节省开销,减少LSA(链路状态通告)骨干区域与非骨干区域,在设计网络时,应尽量将非骨干区域必须与骨干区域相连,否则将导致不规则区域产生2.不规则区域的解决方案2.1做virtual-linkcmddemo:area66virtual-link8.8.8.82.2tunnel,先做tunnel,然后把tunnel发布到骨干区域cmddemo:interfacetunnel1
怪兽男·2019-03-28 15:35

LeetCode 862 Shortest Subarray with Sum at Least K (单调队列 推荐)

Returnthelengthoftheshortest,non-empty,contiguoussubarrayofAwithsumatleastK.Ifthereisnonon-emptysubarraywithsumatleastK,return-1.Example1:Input:A=[1],K=1Output:1Example2:Input:A=[1,2],K=4Output:-1Exam
_TCgogogo_·2019-02-12 14:52

Shortest Distance to a Character

Difficulty:EasyProblemGivenastringSandacharacterC,returnanarrayofintegersrepresentingtheshortestdistancefromthecharacterCinthestring.Example1:Input:S="loveleetcode",C='e'Output:[3,2,1,0,1,0,0,1,2,2,1,
忠ju·2019-02-05 15:00

Shortest Distance to a Character

题目GivenastringSandacharacterC,returnanarrayofintegersrepresentingtheshortestdistancefromthecharacterCinthestring.Example1:Input:S="loveleetcode",C='e'Output:[3,2,1,0,1,0,0,1,2,2,1,0]Note:Sstringlength
liuqinh2s·2018-12-29 00:00

Shortest Subarray with Sum at Least K 解题报告（C++）

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队列日期题目地址：https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k
负雪明烛·2018-12-20 10:32

Shortest Unsorted Continuous Subarray（easy）

581.ShortestUnsortedContinuousSubarray（easy）Givenanintegerarray,youneedtofindonecontinuoussubarraythatifyouonlysortthissubarrayinascendingorder,thenthewholearraywillbesortedinascendingorder,too.Younee
momottyy·2018-12-16 15:17

Shortest Word Distance

ProblemGivenalistofwordsandtwowordsword1andword2,returntheshortestdistancebetweenthesetwowordsinthelist.Example:Assumethatwords=["practice","makes","perfect","coding","makes"].Input:word1=“coding”,wor
linspiration·2018-12-14 00:00

[LeetCode] Shortest Distance to a Character 到字符的最短距离

GivenastringSandacharacterC,returnanarrayofintegersrepresentingtheshortestdistancefromthecharacterCinthestring.Example1:Input:S="loveleetcode",C='e'Output:[3,2,1,0,1,0,0,1,2,2,1,0]Note:Sstringlengthis
Grandyang·2018-12-13 11:00

Shortest Bridge

ProblemInagiven2DbinaryarrayA,therearetwoislands.(Anislandisa4-directionallyconnectedgroupof1snotconnectedtoanyother1s.)Now,wemaychange0sto1ssoastoconnectthetwoislandstogethertoform1island.Returnthesm
linspiration·2018-12-10 00:00

Shortest path of the king(简单bfs记录路径)

Codeforces-A.Shortestpathoftheking(简单bfs记录路径)A.Shortestpathofthekingtimelimitpertest1secondmemorylimitpertest64megabytesinputstandardinputoutputstandardoutputThekingisleftaloneonthechessboard.Inspiteo
小小小丸子儿·2018-12-07 21:00

Shortest Palindrome

ProblemGivenastrings,youareallowedtoconvertittoapalindromebyaddingcharactersinfrontofit.Findandreturntheshortestpalindromeyoucanfindbyperformingthistransformation.Example1:Input:"aacecaaa"Output:"aaac
linspiration·2018-12-05 00:00

Shortest Subarray with Sum at Least K

下面给出题目地址：https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/这道题的大意是给定一个整数序列，求一个最短的连续非空的子序列
dicecaster·2018-11-29 10:33

Shortest Subarray with Sum at Least K

ProblemReturnthelengthoftheshortest,non-empty,contiguoussubarrayofAwithsumatleastK.Ifthereisnonon-emptysubarraywithsumatleastK,return-1.Example1:Input:A=[1],K=1Output:1Example2:Input:A=[1,2],K=4Output
linspiration·2018-11-26 00:00

Shortest Path Visiting All Nodes

下面给出题目地址：https://leetcode.com/problems/shortest-path-visiting-all-nodes/这道题的意思就是说给出一个无向连通图，找出可以遍历所有点的最短路径
dicecaster·2018-11-14 16:03

【刷（shui）题记录】201811 无言的一月

DP11.03LGP1979——Search——BFS11.04LGP1637——BITLGP3847——DP——IntervalLGP4427——Map——LCA11.05LGP1606——Map——Shortest_Way
Dream_Lolita·2018-11-11 19:29

Data Structures and Algorithms (English) - 6-17 Shortest Path [4]（25 分）

题目链接：点击打开链接题目大意：略。解题思路：注意：因为一开始mi==0导致0+无法到达的点（INF）==INF==dist[i]，s.t.num[i]、path[i]误被更新，所以需要再加个判断条件——“Graph->G[S][i]!=INFINITY”，这样也省了再末尾重新更新。AC代码voidShortestDist(MGraphGraph,intdist[],intpath[],Verte
Lux_Sun·2018-11-05 10:40

Yen 的k_shortest paths 算法的C++实现

具体介绍见：https://en.wikipedia.org/wiki/Yen%27s_algorithm还有具体步骤见：https://blog.csdn.net/sharpdew/article/details/446510?tdsourcetag=s_pctim_aiomsg我也不知道我对这个算法理解是否完全正确，但是大体的数据结构和逻辑是正确的，希望大家指点，后期我更理解了，会做相应修改。
cysisu·2018-10-26 10:45

10/19/2018 Dijkstra's shortest path algorithm

Dijkstra'sshortestpathalgorithm:Dijkstra'salgorithmisverysimilartoPrim'salgorithmforminimumspanningtree.LikePrim'sMST,wegenerateaSPT(shortestpathtree)withagivensourceasroot.(单源最短路）Thebasicideaisthatwe
Altoria7·2018-10-21 22:56

Shortest Completing Word

题目描述记录这道题的目的在于第二种解法比较有启发意义方法一：我的lowB做法classSolution:defshortestCompletingWord(self,licensePlate,words):""":typelicensePlate:str:typewords:List[str]:rtype:str"""characterSet=[]foriinlicensePlate:ifi.is
很吵请安青争·2018-10-11 08:22

LeetCode #862 Shortest Subarray with Sum at Least K

文章目录题目分析过程暴力求解寻找优化由end寻找begin结语题目ShortestSubarraywithSumatLeastKReturnthelengthoftheshortest,non-empty,contiguoussubarrayofAwithsumatleastK.Ifthereisnonon-emptysubarraywithsumatleastK,return-1.Example
SquirrelYuyu·2018-10-08 10:15

Shortest Subarray with Sum at Least K - Python

问题描述：和至少为K的最短子数组返回A的最短的非空连续子数组的长度，该子数组的和至少为K。如果没有和至少为K的非空子数组，返回-1。示例1：输入：A=[1],K=1输出：1示例2：输入：A=[1,2],K=4输出：-1示例3：输入：A=[2,-1,2],K=3输出：3提示：1=1的，也就是说k>0，后面会用到。（2）设，dp[i]=A[0]+A[1]+...+A[i-1]，就是dp[i]=列表第i
GorillaNotes·2018-07-07 21:12

Shortest Subarray with Sum at Least K

LeetCode:862.ShortestSubarraywithSumatLeastK题目描述Returnthelengthoftheshortest,non-empty,contiguoussubarrayofAwithsumatleastK.Ifthereisnonon-emptysubarraywithsumatleastK,return-1.Example1:Input:A=[1],K=
杨领well·2018-07-01 17:17

[POJ] 2001 Shortest Prefixes

POJ2001求一群字符串的最短能代表该串的前缀，trie裸题#include#include#includeusingnamespacestd;constintMAXN=1024;constintC_SIZE=32;constintMAXNNODE=20050;intch[MAXNNODE][C_SIZE];intsiz[MAXNNODE];booltail[MAXNNODE];inttot=1
Gh0stCai·2018-06-25 10:53

Shortest Path Visiting All Nodes

这周lc比赛最后一题比较复杂拿出来说下Anundirected,connectedgraphofNnodes(labeled0,1,2,...,N-1)isgivenasgraph.graph.length=N,andj!=iisinthelistgraph[i]exactlyonce,ifandonlyifnodesiandjareconnected.Returnthelengthofthesh
玉界尺·2018-06-06 16:21

【刷（shui）题记录】201805 ~201806

5.1BZOJ1101——Math——Mobius5.3LGP3644——Data_Structure——Balanced_Binary_Tree——SplayLGP3645——Map——Shortest_Way
Dream_Lolita·2018-05-17 11:19

POJ-2001-Shortest Prefixes（字典树入门题）

ShortestPrefixesTimeLimit:1000MSMemoryLimit:30000KTotalSubmissions:20382Accepted:8819DescriptionAprefixofastringisasubstringstartingatthebeginningofthegivenstring.Theprefixesof“carbon”are:“c”,“ca”,“ca
陈大美女·2018-05-02 20:24

Shortest Unsorted Continuous Subarray python

给定一个整数数组，你需要找到一个连续的子数组，如果你只按升序对这个子数组进行排序，那么整个数组也将按照升序排序。你需要找到最短的这种子阵列并输出它的长度。排序后比对不相同的数段classSolution(object):deffindUnsortedSubarray(self,nums):""":typenums:List[int]:rtype:int"""s=e=-1snums=sorted(n
Adamoptimization·2018-04-11 15:05

Shortest Unsorted Continuous Subarray [python]

题目：Givenanintegerarray,youneedtofindonecontinuoussubarraythatifyouonlysortthissubarrayinascendingorder,thenthewholearraywillbesortedinascendingorder,too.Youneedtofindtheshortestsuchsubarrayandoutputit
茨威格的小胡子·2018-03-28 20:59

SPFA 算法(Shortest Path Faster Algorithm)

一、算法背景求单源最短路的SPFA算法的全称是：ShortestPathFasterAlgorithm。SPFA算法是西南交通大学段凡丁于1994年发表的。有人称spfa算法是最短路的万能算法。二、适用范围：给定的图存在负权边，这时类似Dijkstra等算法便没有了用武之地，而Bellman-Ford算法的复杂度又过高，SPFA算法便派上用场了。我们约定有向加权图G不存在负权回路，即最短路径一定存
别再想更好的办法·2018-03-12 21:03

蚁群算法matlab源码

function[Shortest_Route,Shortest_Length]=ACATSP(D,NC_max,m,Alpha,Beta,Rho,Q)%%=======================
dftxmloo600965·2018-03-04 17:00

codeforces 59E shortest path

今天终于做出了一道困扰我一学期的题，就是这道shortestpath。其要求不能连续访问某些三个城市，比如限制123，则不能在访问完1、2后访问3.一种直白的想法（从同班同学黄毅飞那里听来的）就是以边建图，同时可以增加一个起始城市0连一条0->1的单行道，再连一条n->n+1的单行道，从而转换为0到n+1的dijkstra（但是后来发现dijkstra会超时，注意到其边权恒为1，所以可用一次bfs
ILIKUSUNYI·2018-02-25 23:47

6-17 Shortest Path [4]（25 分）

6-17ShortestPath[4]（25分）Writeaprogramtofindtheweightedshortestdistancesfromanyvertextoagivensourcevertexinadigraph.Ifthereismorethanoneminimumpathfromvtow,apathwiththefewestnumberofedgesischosen.Itisg
四月~·2018-02-25 12:13

6-16 Shortest Path [3]（25 分）

6-16ShortestPath[3]（25分）Writeaprogramtonotonlyfindtheweightedshortestdistances,butalsocountthenumberofdifferentminimumpathsfromanyvertextoagivensourcevertexinadigraph.Itisguaranteedthatalltheweightsar
四月~·2018-02-25 10:23

6-11 Shortest Path [1]（25 分）

6-11ShortestPath[1]（25分）Writeaprogramtofindtheunweightedshortestdistancesfromanyvertextoagivensourcevertexinadigraph.Formatoffunctions:voidShortestDist(LGraphGraph,intdist[],VertexS);whereLGraphisdefi
四月~·2018-02-18 21:02

shortest path

今天做了hdu4479的一道题，是要求找到单源最短路径，同时路径上的边的距离需要是严格单调递增的。乍一看其已经不再符合贪心的结构，不能用dijkstra来直接处理。这里感觉要换下思路，即将建立单源最短路的过程看成是一个集合的扩张过程，其中通过保证扩张的过程是从边权递增的顺序进行以完成扩展，同时在每一轮中进行相应处理判断即可。另外确实要学习更多stl的巧妙用法了。#include#include#i
ILIKUSUNYI·2018-02-08 19:35

[LintCode] Knight Shortest Path II

Givenaknightinachessboardn*m(abinarymatrixwith0asemptyand1asbarrier).theknightinitialzepositionis(0,0)andhewantstoreachposition(n-1,m-1),Knightcanonlybefromlefttoright.Findtheshortestpathtothedestinat
codingEskimo·2018-02-01 11:00

HDU 2807 The Shortest Path 【最短路 + 快速判断矩阵是否相等】

传送门//题意:给定n个m*m的矩阵,如果A*B==C矩阵,那么A->C有一条长度为1的边.最后给出q次询问,每次询问两个矩阵的最短距离.//思路:很明显我们首先需要先把矩阵先存下来,然后n^3方建图,然后我们知道矩阵相乘是n^3的，然后判断两个矩阵是否相等是n^2的,一共就是n^5的，完全会爆炸.所以这样肯定不行.所以我们首先要对矩阵进行hash降维判断.使得判断是O(n)的,这样相乘也变成n^
Anxdada·2018-01-29 17:43
上一页 5 6 7 8 9 10 11 12 下一页
按字母分类： ABCDEFGHIJKLMNOPQRSTUVWXYZ其他