islands

hihocoder 1138 Islands Travel dijkstra+heap 难度:2

http://hihocoder.com/problemset/problem/1138   很久不用最短路,几乎连基本性质也忘了,结果这道题就是某些最短路算法空间复杂度是o(n) 这里总结四种算法   算法名称           时间复杂度   
·2015-10-27 14:58

Islands

Islands 限制条件 时间限制: 2 秒, 内存限制: 256 兆 题目描述 Whenever it rains, Farmer John's field always ends up flooding
·2015-10-27 13:19

HDU 1668 Islands and Bridges

Islands and Bridges Time Limit: 4000ms Memory Limit: 65536KB This problem will be judged on 
·2015-10-27 13:30

SQL Server Window Function 窗体函数读书笔记一 - SQL Windowing

;窗体函数主要用来处理由 OVER 子句定义的行集, 主要用来分析和处理 Running totals Moving averages Gaps and islands
·2015-10-27 12:58

为什么牛逼互联网公司都在开曼群岛注册？

　　开曼群岛(Cayman Islands)是英国在西印度群岛的一块海外属地，由大开曼、小开曼和开曼布拉克3个岛屿组成。开曼群岛是世界第四大离岸金融中心，并是著名的潜水胜地。
·2015-10-27 11:21

[leetcode] Number of Islands

ProblemDescription:Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesoft
fanoluo·2015-10-25 23:00

Sea and Islands 构造

Sea and Islands Time Limit: 20 Sec  Memory Limit: 256 MB 题目连接 http://codeforces.com/contest
·2015-10-23 09:25

poj 2288 Islands and Bridges_状态压缩dp_哈密尔顿回路问题

题目链接 题目描写叙述：哈密尔顿路问题。n个点，每个点有权值，设哈密尔顿路为 C1C2...Cn，Ci的权值为Vi，一条哈密尔顿路的值分为三部分计算： 1.每个点的权值之和 2.对于图中的每一条CiCi+1，加上Vi*Vi+1 3.对于路径中的连续三个点：CiCi+1Ci+2，若在图中，三点构成三角形，则要加上Vi*Vi+1*Vi+2 求一条汉密尔顿路能够获得的最大值，而且还要输出有多少条这种哈
·2015-10-23 08:09

LeetCode - Number of Islands

Number of Islands 2015.4.17 06:16 Given a 2d grid map of '1's (land) and '0's (water), count
·2015-10-23 08:57

每日英语：Japan Leader Warns China on Islands Dispute

TOKYO—Japan's prime minister warned China that its inflammatory reaction to a territorial dispute—from violent protests to apparent informal trade sanctions—could further weaken China's already-fragil
·2015-10-22 21:16

每日英语：The Dangers of a China-Japan Trade War

Protests against the Japanese purchase of the Senkaku / Diaoyu Islands took place in various Chinese
·2015-10-22 21:15

Codeforces#302-B-Sea and Islands-水题

http://codeforces.com/contest/544/problem/B题意：给你n,k;在n*n的矩阵插入m个L，使得最后有k块连在一起的L集合；如果2个L在上下左右的边上相邻则算为连在一起（对角线不算）最大的块数就是if(n%2) big=n/2*n+(n+1)/2; else big=n*n/2;然后间隔地插入就好了。。。插够了剩下的空位直接全部输出#include #incl
viphong·2015-10-21 17:00

GAPSAND ISLANDS

寻找列中的gap.其实在inside sql server 2008中有专门的讨论。 create table test (id int primary key); go insert into values (1),(2),(3),(4),(5),(6),(8),(9),(11),(12),(13),(14),(18),(19) 查找出结果为： missingbefore missin
·2015-10-21 12:20

Python自然语言处理学习笔记(49)： 练习

web for "spoof newspaper headlines", to find such gems as: British Left Waffles on Falkland Islands
·2015-10-21 11:02

LeetCode Number of Islands

原题链接在这里：https://leetcode.com/problems/number-of-islands/Givena2dgridmapof '1's(land)and '0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyo
Dylan_Java_NYC·2015-10-17 08:00

[leetcode] 200 Number of Islands(DFS)

非常基础的一道DFS深度优先搜索的题目，当我们遍历数组发现一个位置为'1'时，就是用dfs将其周围的1全部变为0，然后递归继续，这样所有连通成一片的'1'就是一个island，sum++，最后返回sum即可。类似的题目还有hdu1016，hdu1241。intdir[4][2]={{-1,0},{1,0},{0,1},{0,-1}}; classSolution{ public: voiddfs
NK_test·2015-10-12 23:00

[leetcode]Number of Islands

classSolution{ public: voidhelp(vector>&g,intx,inty){//dfs if((x=g.size())||(y=g[x].size())||(g[x][y]!='1')){//边界条件 return; } g[x][y]=0;//原地标记 help(g,x-1,y);//上移 help(g,x+1,y);//下移 help(g,x,y-1);//左移
lydyangliu·2015-10-12 14:00

poj 2282 Islands and Bridges(状压DP)

n个点，m条无向边，问是否存在哈密顿路，若存在，最大的边权和是多少？与之对应的路的条数有多少条？边权和的计算方法：所有顶点的权值+相邻顶点权值的乘积若相邻三个点两两之间都有边，则还需加上它们的权值的乘积考虑用一个二进制位表示某个顶点是否被访问。用n个二进制位表示一个状态。注意到，每一个状态和前一个走过的顶点以及上上个走过的顶点有关。因此，设dp[s][i][j]表示在状态s下，经过顶点j，到达顶点
u014679804·2015-10-09 19:00

Number of Islands - leetcode

原题链接题目:Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands. Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically. Youmayassumeallfouredgesofthegridarea
xuanyoumeng·2015-10-03 14:00

leetcode:Number of Islands

原题为：Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsur
x_i_y_u_e·2015-10-03 13:00

*LeetCode-Number of Islands

扫一遍就可以了只要这个点是1就开始explore它的neighbors然后知道没有了就返回这时候主程序count＋＋记得要把explore过的点mark为0publicclassSolution{ publicintnumIslands(char[][]grid){ intcount=0; for(inti=0;i=grid.length||row=grid[0].length||col<0||g
bsbcarter·2015-09-29 05:00

[LeetCode 200] Number of Islands

Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurroun
sbitswc·2015-09-13 13:00

Leetcode - Number of Islands

[分析]BFS&DFS法详见实现。这里阐述下union-find思路，思路很直接，我们需要把相连在一起的1union起来，最后数下union了多少个集合1。输入时一个m*n矩阵，union-find相应地需要一个二维数组保存信息，采用按秩求并方法，初始时每个1元素的秩为-1,0元素不参与union，记为0。扫描数组，对于(i,j)元素，查看其是否需要同右边和下边相邻元素合并，其上边和左边不需要，因
likesky3·2015-09-02 09:00

Number of Islands —— Leetcode（重要的一类题）

Givena2dgridmapof '1's(land)and '0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurro
blitzskies·2015-09-01 20:40

Number of Islands —— Leetcode（重要的一类题）

Givena2dgridmapof '1's(land)and '0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurro
BlitzSkies·2015-09-01 20:00

URAL 1272 Non-Yekaterinburg Subway (查并集)

#include #defineMAX_ISLANDS(10000+1) #defineMAX_TUNELS(12000+1) #defineMAX_BRIDGES(12000+1) structCONNECTION
tiutiu2011·2015-09-01 13:00

leetcode Number of Islands

题目链接思路：广度优先搜索代码publicclassSolution{ publicintnumIslands(char[][]grid){ intcount=0; for(inti=0;igrid.length-1) { return; } if(columIndexgrid[0].length-1) { return; } if(grid[rowIndex][columIndex]=='0
bleuesprit·2015-08-29 21:00

jQuery的Chosen插件（带检索的下拉菜单）

                         United States             United Kingdom             Afghanistan             Aland Islands
zhaoqingbei·2015-08-27 15:38

jQuery的Chosen插件（带检索的下拉菜单）

                         United States             United Kingdom             Afghanistan             Aland Islands
zhaoqingbei·2015-08-27 15:38

【LeetCode-面试算法经典-Java实现】【200-Number of Islands（岛的数目）】

【200-NumberofIslands（岛的数目）】【LeetCode-面试算法经典-Java实现】【所有题目目录索引】代码下载【https://github.com/Wang-Jun-Chao】原题Givena2dgridmapof‘1’s(land)and‘0’s(water),countthenumberofislands.Anislandissurroundedbywaterandisf
derrantcm·2015-08-25 06:02

【LeetCode-面试算法经典-Java实现】【200-Number of Islands（岛的数目）】

【200-NumberofIslands（岛的数目）】【LeetCode-面试算法经典-Java实现】【所有题目目录索引】代码下载【https://github.com/Wang-Jun-Chao】原题Givena2dgridmapof‘1’s(land)and‘0’s(water),countthenumberofislands.Anislandissurroundedbywaterandisf
DERRANTCM·2015-08-25 06:00

【LeetCode-面试算法经典-Java实现】【200-Number of Islands（岛的数目）】

【200-NumberofIslands（岛的数目）】【LeetCode-面试算法经典-Java实现】【所有题目目录索引】代码下载【https://github.com/Wang-Jun-Chao】原题Givena2dgridmapof‘1’s(land)and‘0’s(water),countthenumberofislands.Anislandissurroundedbywaterandisf
DERRANTCM·2015-08-25 06:00

HDU 3405 World Islands （prim算法）

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=3405【题目大意】给你n个点的坐标，忽视其中一个点，求余下点的最小生成树。我们不知道忽视的是哪一个点，所以要进行n次最小生成树。prim算法需要使用一个标记数组intree，我们只要把忽视的那个点放入intree就不会扫描了；【源代码】#include #include #include #includ
chaiwenjun000·2015-08-20 08:00

快速数论变换模板(NTT)

/* *Author:islands *CreatedTime:2015/7
u012127882·2015-07-31 20:00

LeetCode 题解（131）: Number of Islands

题目：Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurr
u011029779·2015-06-30 02:00

Number of Islands （leetcode）

Givena2dgridmapof‘1’s(land)and‘0’s(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurroun
wuhuaiyu·2015-06-27 19:00

Leetcode - Number Of Islands

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands.
likesky3·2015-06-27 10:00

Find Islands

Given matrix MxN of 0s and 1s, return and output all groups of adjacent 1s in form of (row,col)... 1s are considered adjacent if they are adjacent horizontally or vertically. 1 1 0 1 0 1 1 1 1 1 0
yuanhsh·2015-06-24 11:00

Find Islands

GivenmatrixMxNof0sand1s,returnandoutputallgroupsofadjacent1sinformof(row,col)...1sareconsideredadjacentiftheyareadjacenthorizontallyorvertically.110101 111101 000011 101010Output:A:(0,0)(1,0)(0,1)(
yuanhsh·2015-06-24 11:00

[LeetCode] Number of Islands

This is a typical problem about searching. In fact, you can use either BFS or DFS for it. Personally, I use BFS because I think it is more intuitive and easy to implement. The idea is fairly sim
·2015-06-23 20:00

Number of Islands

Givena2dgridmapof '1's(land)and '0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurro
brucehb·2015-06-22 00:00

leetcode--Number of Islands

Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurroun
kangaroo835127729·2015-06-20 17:00

Number of Islands

dfs遍历。第二遍：classSolution { public: intnumIslands(vector>&grid) { if(grid.size()==0) { return0; } intcnt=0; intdir[4][2]={{-1,0},{1,0},{0,-1},{0,1}}; vector>vi(grid.size(),vector(grid[0].size(),false))
u014674776·2015-06-17 14:00

【LeetCode】Number of Islands

NumberofIslands TotalAccepted:8945TotalSubmissions:41107MySubmissionsQuestionSolution Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnecti
u013027996·2015-06-02 09:00

[LeetCode-JAVA] Number of Islands

题目： Given a 2d grid map of '1's (land) and '0's (water), count the number of islands.
·2015-06-01 09:00

Number of Islands

GivenaNxNmatrixwithvaluesXandOwhereXrepresentlandandOrepresentwaterfindthenumberofislands.TwoconsecutiveXX(horizontalorvertical)willbepartofsingleislandwhilediagonalXXarenot.(Solveusinggraph-DFSorBFSw
yuanhisn·2015-05-28 09:00

Codeforces544B:Sea and Islands

Amapofsomeobjectisarectangularfieldconsistingof n rowsand n columns.Eachcellisinitiallyoccupiedbytheseabutyoucancoversomesomecellsofthemapwithsandsothatexactly k islandsappearonthemap.Wewillcallasetof
libin56842·2015-05-15 13:00

[LeetCode] Number of Islands

Givena2dgridmapof'1's(land)and'0's(water),countthenumberofislands.Anislandissurroundedbywaterandisformedbyconnectingadjacentlandshorizontallyorvertically.Youmayassumeallfouredgesofthegridareallsurroun
u011331383·2015-05-01 19:00

leetcode:Number of Islands

其实该题为求连通子图的个数，可以借助DFS的思想：classSolution{ public: booldfs(inti,intj,vector>&grid) { if(i>=0&&i=0&&j>&grid){ intnum=0; for(inti=0;i
majing19921103·2015-04-18 13:00

[LeetCode]Number of Islands，解题报告

目录目录前言题目思路AC代码我的疑问前言利用晚上11点之后的时间刷刷LeetCode也是我的一种休闲方式。不过水这篇博客是因为这道简单的BFS题目我竟然用了13次才AC，最后AC还是因为我参考了别人的答案，稍后我会说一下我对这道题的疑惑。先贴出这道题目我艰难的AC过程：中间那次313ms的ac答案是我直接把别人的AC代码贴上，因为当时我怀疑这道题目答案是否出了问题。题目Givena2dgridma
zinss26914·2015-04-15 23:00
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