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cows
POJ 2387 Til the
Cows
Come Home【dijkstra模板题】
POJ2387TiltheCowsComeHome题目大意:无向图中,从点n到点1的最短路径具体思路:dijkstra,考虑重边注意下标减1,建议下次还是不使用0号,便于理解具体代码:#include#include#include#includeusingnamespacestd;intt,n;constintN=1005;constintINF=1e5;intedgs[N][N];intvis
三寸雪
·
2020-09-11 18:13
最短路
OJ题解
求解有向图的强连通分量的SCC问题---POJ 2186 Popular
Cows
【SCC问题】在有向图G中,如果两个顶点间至少存在一条路径,称两个顶点强连通(stronglyconnected),如果有向图G的每两个顶点都强连通,称G是一个强连通图.通俗的说法是:从图G内任意一个点出发,存在通向图G内任意一点的的一条路径.非强连通图有向图的极大强连通子图,称为强连通分量(stronglyconnectedcomponents,SCC).求图强连通分量的意义是:由于强连通分量内
Keaper
·
2020-09-11 04:02
ACM---图论
poj 2387 Til the
Cows
Come Home(最短路水题 = =)
抓狂==。。最水最短路,好久没做了,做一道试试==。结果让我检查了好久==。开始忘了让它弄成双向的那句话==。然后一直RE==。发现t和n输入反了==。。。我去死吧==#include#include#include#includeusingnamespacestd;intmap[1010][1010];intdis[1010];intn,pos,sum;voidinit(){for(inti=0
zxy_snow
·
2020-08-26 16:52
poj
最短路径
差分约束
【最短路】Til The
Cows
Come home(裸题)
题意就是给你一张图,让你找从N到1的最短路坑:可能有重边SampleInput55122023303420452015100SampleOutput90参考:https://blog.csdn.net/major_zhang/article/details/72519233自己写的简单Dijkstra:#include#include#include#include#include#defineM
zhugezy
·
2020-08-26 16:36
POJ2387 Til the
Cows
Come Home(最短路)
POJ2387TiltheCowsComeHome(最短路)目录POJ2387TiltheCowsComeHome(最短路)目录原题大概题意代码块传送门原题DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningm
D白
·
2020-08-26 16:02
题解
模板
Til the
Cows
Come Home | 最短路 | dijskra | 板子题
dijskra的本质是贪心,每次都找当前点下一步最近的点,然后这个找出来的点再找下去。这篇讲的很明白:传送门#includeusingnamespacestd;#defineINF1ans[j]){k=j;Min=ans[j];}vis[k]=true;//计算所有该点(上面找到的最小值)能到达的点的可能的最短路径for(j=1;j<=n;j++)if(!vis[j]&&Min+Map[j][k]
TriAzure
·
2020-08-26 16:42
图论
kuangbin
暑假集训
POJ 2387 Til the
Cows
Come Home(Dijkstra判重边)
TiltheCowsComeHomeTimeLimit:1000MSMemoryLimit:65536KTotalSubmissions:31748Accepted:10757DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherfort
wikioi_bai
·
2020-08-26 15:32
---最短路&&差分约束
POJ&&ZOJ
POJ 2387 Til the
Cows
Come Home (Dijkstra)
传送门:http://poj.org/problem?id=2387题目大意:给定无向图,要求输出从点n到点1的最短路径。注意有重边,要取最小的。水题。。对于无向图,从1到n和n到1是一样的。直接Dijkstra即可#include#includeconstintMAXN=1000+10;constintINF=999999;intmap[MAXN][MAXN];intdis[MAXN];intm
weixin_30367543
·
2020-08-26 14:06
USACO1.2 Milking
Cows
原文链接:http://ace.delos.com/usacoprob2?a=jhNhQpzCaEE&S=milk2题目分析:据说有四种思想:1.离散化2.线段树3.标记数组4.分段DP我的时第一种思想:离散化(其实就是进行了优化的搜索而已)按照开始时间升序排序,然后从左到右扫一遍,复杂度是O(nlogn+n)的(排序+扫一遍,用堆、合并、快排都可以)。所谓从左到右扫一遍,就是记录一个当前区间,[
sumi
·
2020-08-26 14:57
模拟
poj2387- Til the
Cows
Come Home
想看更多的解题报告:http://blog.csdn.net/wangjian8006/article/details/7870410转载请注明出处:http://blog.csdn.net/wangjian8006题目大意:有N个点,给出从a点到b点的距离,当然a和b是互相可以抵达的,问从1到n的最短距离解题思路:模版题,这题要注意的是有重边,dijkstra的算法需要考虑下,bellman-f
wangjian8006
·
2020-08-26 14:41
C
poj
Til the
Cows
Come Home(最短路—Dijkstra算法)
BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyaspossible.FarmerJohn'sfield
vizard_
·
2020-08-26 14:03
POJ 2387 Til the
Cows
Come Home(Dijkstra简单题)
POJ2387TiltheCowsComeHome(Dijkstra简单题)http://poj.org/problem?id=2387题意:有N个顶点和T条边的无向图,现在要问你从1号顶点到N号顶点的最短距离是多少?分析:直接通刘汝佳的Dijkstra模板,不过注意题中可能有重边.(不过不影响)AC代码:#include#include#include#include#includeusingn
focus_best
·
2020-08-26 14:13
practice
again
ACM--题解汇总
★★
图论--Dijkstra
[树状数组]poj2481
Cows
poj2481
Cows
,题目链接题意:好吧又是熟悉的牛,一条河岸,每只牛都有吃草范围[S,E],它们或强壮或虚弱。
soundwave_
·
2020-08-26 14:38
树状数组
Til the
Cows
Come Home (Dijstra最短路算法)
BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyaspossible.FarmerJohn'sfield
HUGOkungggg
·
2020-08-26 14:28
ACM
Til the
Cows
Come Home(最短路,注意重边)
题目链接:http://poj.org/problem?id=2387DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewants
永远鲜红の幼月
·
2020-08-26 13:48
图论
POJ 2456 Aggressive
cows
(二分查找最大化最小值)
题目链接:http://poj.org/problem?id=2456【中文题意】有n间牛舍,第i间牛舍的位置在xi处。有m头牛,他们对牛舍都不满意,经常互相攻击。为了防止牛之间互相攻击,因此把每头牛放在距离其他牛尽量远的位置。也就是要最大化最近的两头牛之间的距离。【思路分析】1.对牛舍的位置进行排序。2.把第一头牛放入x0牛舍。3.二分距离,找到距离的最大值。【AC代码】#include#inc
夜幕下的ACM之路
·
2020-08-26 13:35
POJ
二分查找
经典题目
拓扑排序
POJ 2387 Til the
Cows
Come Home(迪杰斯特拉/优先队列/最短路)
题目:http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=18265代码:#include#include#includeusingnamespacestd;constintmaxn=2005;vector>E[maxn];intd[maxn];intn,m;voidinit(){for(inti=0;i>Q;Q.push(mak
tenglinxi
·
2020-08-26 13:33
Til the
Cows
Come Home(最短路)
原题链接TiltheCowsComeHomeTimeLimit:1000MSMemoryLimit:65536KTotalSubmissions:45313Accepted:15372DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesher
HowieMen
·
2020-08-26 13:28
▶︎算法与数据结构
POJ2387 - Til the
Cows
Come Home(Dijkstra 单源最短路)
TiltheCowsComeHome(POJ2387)BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklya
亓迹
·
2020-08-26 13:24
最短路
POJ 2387 Language: Til the
Cows
Come Home(spfa)
【题目链接】http://poj.org/problem?id=2387题目意思她想从奶牛场尽快回去睡美容觉,问你最短路径是多少?(1为家,n为奶牛场)解题思路最短路模板题,数据不大用邻接矩阵或邻接表都可以。下面是spfa的代码代码部分#include#include#include#include#include#include#includeusingnamespacestd;#defineL
魂骸
·
2020-08-26 13:31
最短路
poj2387 Til the
Cows
Come Home (dijkstra)
链接:http://poj.org/problem?id=2387TiltheCowsComeHomeTimeLimit:1000MSMemoryLimit:65536KTotalSubmissions:46509Accepted:15814DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspos
一七得七
·
2020-08-26 13:27
图论
POJ 2387 - Til the
Cows
Come Home
A-TiltheCowsComeHomeTimeLimit:1000MSMemoryLimit:65536KB64bitIOFormat:%I64d&%I64uSubmitStatusPracticePOJ2387Appointdescription:SystemCrawler(2016-01-29)DescriptionBessieisoutinthefieldandwantstogetback
leifjacky
·
2020-08-26 13:43
POJ
最短路
POJ 2387 Til the
Cows
Come Home (最短路径 模版题 三种解法)
原题链接:TiltheCowsComeHome题目大意:有个点,给出从点到点的距离并且和是互相可以抵达的,问从到的最短距离。题目分析:这是一道典型的最短路径模版题,需要注意的是:使用dijkstra算法求解需要考虑有重复边问题,而使用bellman-ford算法和spfa算法可以忽略这个问题。代码如下://Dijkstra#includeusingnamespacestd;constintINTF
laugh12321
·
2020-08-26 13:41
模版
最短路径
算法
Til the
Cows
Come Home (Dijkstra)
BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyaspossible.FarmerJohn'sfield
爱上键盘的小哥哥
·
2020-08-26 12:37
最短路径
POJ2387---Til the
Cows
Come Home
SPFA比dijkstra快一点吧#include#include#include#includeusingnamespacestd;#defineinf0xffffffintn,m,maze[1010][1010];intdis[1010],used[1010];voidinit(){for(inti=1;iq;q.push(1);used[1]=1;dis[1]=0;while(!q.empt
hy1405430407
·
2020-08-26 12:31
A - Til the
Cows
Come Home
A-TiltheCowsComeHomeTimeLimit:1000MSMemoryLimit:65536KB64bitIOFormat:%I64d&%I64uSubmitStatusPracticePOJ2387DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFar
持之以恒_fighting
·
2020-08-26 12:23
最短路径
Til the
Cows
Come Home [最短路模板题]
BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyaspossible.FarmerJohn’sfield
HPU2_2
·
2020-08-26 12:50
图
Til the
Cows
Come Home POJ - 2387 最短路,dij+优先队列
BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyaspossible.FarmerJohn'sfield
追寻的真物
·
2020-08-26 12:17
图论
POJ2481
Cows
CowsTimeLimit:3000MSMemoryLimit:65536KTotalSubmissions:11946Accepted:3942DescriptionFarmerJohn'scowshavediscoveredthattheclovergrowingalongtheridgeofthehill(whichwecanthinkofasaone-dimensionalnumberli
eeeaaaaa
·
2020-08-26 12:42
树状数组
Til the
Cows
Come Home (Digkstra邻接矩阵裸模板)
用init()子函数来初始化各种数据,包括节点与节点之间未连通状态时权值为INF(除了相同的节点),以及每个节点初始化权值为INF(除了第一个节点),还有就是标记数组,说明都还未被访问过。用digkstra子函数用了三个for循环,最外层循环是为了遍历全部的节点,使他们的权值都改变为从一节点到他们各自最小的总权值,第二层循环是为了不断更新未访问的点(最近的优先,所以就有了其中的m=INF,是为了得
起风了_唯有努力生存
·
2020-08-26 12:37
ACM竞赛
【图论】--最短路
ACM的进程
Til the
Cows
Come Home (有向图最短路径问题)
OnecowfromeachofNfarms(1≤N≤1000)convenientlynumbered1..Nisgoingtoattendthebigcowpartytobeheldatfarm#X(1≤X≤N).AtotalofM(1≤M≤100,000)unidirectional(one-wayroadsconnectspairsoffarms;roadirequiresTi(1≤Ti≤
qdu_lkc
·
2020-08-26 12:45
最短路径
Til the
Cows
Come Home(最短路径)
TiltheCowsComeHomeTimeLimit:1000MSMemoryLimit:65536KTotalSubmissions:36299Accepted:12352DescriptionBessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherfort
努力前行吧
·
2020-08-26 12:00
最短路径
poj 2182 Lost
Cows
(线段树经典题)
题目链接:http://poj.org/problem?id=2182LostCowsTimeLimit:1000MSMemoryLimit:65536KTotalSubmissions:9152Accepted:5879DescriptionN(2#include#include#include#include#include#include#include#include#include#in
东南枝DP
·
2020-08-26 12:25
算法
Til the
Cows
Come Home POJ - 2387 (最短路 裸题)
TiltheCowsComeHomePOJ-2387BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyas
Suprit
·
2020-08-26 12:13
思维
POJ 2387 Til the
Cows
Come Home (Spfa)
题意:一头奶牛沿着路标回家,求最短路径。题解:注意处理重边。感觉不错,以后对于无向图就用vector构图,可以省去对重边的处理。对于有向图用记录头结点的边的方式构图。#include#include#includeusingnamespacestd;#defineMAX10000#defineINF9999999structEdge{intv,w,next;};Edgeedge[MAX];inth
ConwayTian
·
2020-08-26 12:21
图论/网络流
Til the
Cows
Come Home
BessieisoutinthefieldandwantstogetbacktothebarntogetasmuchsleepaspossiblebeforeFarmerJohnwakesherforthemorningmilking.Bessieneedsherbeautysleep,soshewantstogetbackasquicklyaspossible.FarmerJohn'sfield
Acerkoo
·
2020-08-26 11:53
最短路
POJ2387 Til the
Cows
Come Home(最短路径)
题意:输入一个图,给出每条边的权值,以1为起点,要求到n的最短路径。要点:今天学了一下最短路,有好多种算法,估计要做好长一段时间了。这题就是最简单的模板,就是稍微注意一下可能有重边。这题用的dijkstra算法,主要是贪心,证明还不会。以后看看能不能推一下。参考博客:点击打开链接点击打开链接dijkstra算法:15365926Seasonal2387Accepted4164K63MSC++852
SeasonJoe
·
2020-08-26 11:40
POJ
数据结构
图论
acm
c语言
poj
kruskal
算法
C. Team Tic Tac Toe(简单暴力)
CC.TeamTicTacToetimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputFarmerJohnowns26
cows
qq_43490894
·
2020-08-26 08:04
GDUT排位赛3
二分 Aggressive
cows
DescriptionFarmerJohnhasbuiltanewlongbarn,withN(2#include#include#include#includeusingnamespacestd;#defineMAXN1000010inta[MAXN];boolfind(intx,intn,intc){inti,mun=1,p=a[1];for(i=2;i=x){mun++;p=a[i];}}i
weixin_30391339
·
2020-08-25 09:34
POJ2456 Aggressive
cows
(二分)
题目链接:http://poj.org/problem?id=2456题意:有n个牛舍,位置为xi,c头牛,把每头牛放在与其相邻牛的距离尽量远的牛舍,即最大化相邻两头牛之间的距离,求这个最大距离。分析:二分答案,然后O(N)的复杂度判断符不符合。代码如下:#include#include#include#includeusingnamespacestd;constintmaxn=100010;in
bigbigship
·
2020-08-25 09:58
二分&&三分
poj2456-Aggressive
cows
FarmerJohnhasbuiltanewlongbarn,withN(2#include#includeusingnamespacestd;intmain(){intN,C,left,right,mid;cin>>N>>C;inta[100005];for(inti=0;i>a[i];}sort(a,a+N);left=1,right=a[N-1];while(right>left+1){mi
SongOrz
·
2020-08-25 09:46
A - Aggressive
cows
POJ - 2456 (二分专题 )
https://vjudge.net/contest/241402#problem/A题意:有n个牛栏,选m个放进牛,相当于一条线段上有n个点,选取m个点,使得相邻点之间的最小距离值最大思路:二分枚举相邻两牛的间距,判断大于等于此间距下能否放进所有的牛,具体详见代码。#include#include#includeusingnamespacestd;intn,c,a[100005];intjudg
小白菜丫
·
2020-08-25 09:04
POJ2456-Aggressive
cows
题目链接:点击打开链接DescriptionFarmerJohnhasbuiltanewlongbarn,withN(2#include#include#include#include#include#include#include#include#include#includeusingnamespacestd;constintMAX=1000000010;constintINF=0X3f3f3
ACMerszl
·
2020-08-25 09:31
【二分】
【POJ】
[POJ 2456]Aggressive
cows
[二分]
RegisterUpdateyourinfoAuthorsranklistCurrentContestPastContestsScheduledContestsAwardContestLucifinilLogOutMail:0(0)LoginLogArchiveLanguage:AggressivecowsTimeLimit:1000MSMemoryLimit:65536KTotalSubmiss
真·skysys
·
2020-08-25 09:53
算法与数学
POJ 百练 2456:Aggressive
cows
描述FarmerJohnhasbuiltanewlongbarn,withN(2#include#includeusingnamespacestd;intjudge(int,int);intarr[100000];intn,c;intmain(){scanf("%d%d",&n,&c);for(inti=0;i=l){D=(l+r)>>1;//D=(l+r)/2;if(judge(n,D)>=c)
今天拿到offer了吗?
·
2020-08-25 09:47
算法
POJ - 2456 Aggressive
cows
DescriptionFarmerJohnhasbuiltanewlongbarn,withN(2#includeusingnamespacestd;intmain(){intn,m,i,l,h,k,t,d;inta[100001],b[100001];cin>>n>>m;for(i=0;i>a[i];}sort(a,a+n);h=a[n-1]-a[0];l=1;for(i=1;i=k){t=0;
Dagon_
·
2020-08-25 09:14
二分
POJ-2456 Aggressive
cows
POJ-2456Aggressivecows题目链接:传送门题目大意:给出坐标轴上的x个坐标,分别对应x个房间;给出c头牛,将这c头牛放入x个房间,每个房间最多放一头,放入后产生c-1个距离,问这c-1个距离中,最小距离的最大取值是多少。样例输入:5312849样例输出:3ps.由于输入数据量较大,题目要求使用scanf解题思路:注意到距离一定不大于“坐标最大值-坐标最小值”,只需二分查找距离,判
CUC_KID
·
2020-08-25 09:40
算法习题备忘
leetcode299猜数字游戏C++
1、题目https://leetcode-cn.com/problems/bulls-and-
cows
/2、题意解法1:先将位置正确且相等的记录,否则记录不相等数每个数的个数,第二次便利,判断那个数是否出现过
everlasting_lxy
·
2020-08-25 05:54
leetcode
leetcode
[Usaco2004 Nov]Til the
Cows
Come Home 带奶牛回家(Dijkstra的优化)
MenuProblem1.题目分析2.Dijkstra算法的逆袭①朴素的Dijkstra&卡数据未优化DijkstraCode小插曲:链式前向星1.建树的Code2.树的遍历Code3.链式前向星Code4.建立图Code5.图的遍历Code②插曲结束&Dijkstra的回顾③优化!优化!堆的运用优化AC具体代码如下3.如有不当之处请各位神犇及时指出!ProblemTimeLimit:1SecMe
Ability.
·
2020-08-25 04:14
入门OJ
Usaco2004
Nov
图论算法
最短路
Milking
Cows
(线段区间问题)
DescriptionThreefarmersriseat5ameachmorningandheadforthebarntomilkthreecows.Thefirstfarmerbeginsmilkinghiscowattime300(measuredinsecondsafter5am)andendsattime1000.Thesecondfarmerbeginsattime700andends
aifu4148
·
2020-08-25 02:56
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