`

HDU 2722 Here We Go(relians) Again

阅读更多

Here We Go(relians) Again

Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 162Accepted Submission(s): 99

Problem Description
The Gorelians are a warlike race that travel the universe conquering new worlds as a form of recreation. Given their violent, fun-loving nature, keeping their leaders alive is of serious concern. Part of the Gorelian security plan involves changing the traffic patterns of their cities on a daily basis, and routing all Gorelian Government Officials to the Government Building by the fastest possible route.

Fortunately for the Gorelian Minister of Traffic (that would be you), all Gorelian cities are laid out as a rectangular grid of blocks, where each block is a square measuring 2520 rels per side (a rel is the Gorelian Official Unit of Distance). The speed limit between two adjacent intersections is always constant, and may range from 1 to 9 rels per blip (a blip, of course, being the Gorelian Official Unit of Time). Since Gorelians have outlawed decimal numbers as unholy (hey, if you're the dominant force in the known universe, you can outlaw whatever you want), speed limits are always integer values. This explains why Gorelian blocks are precisely 2520 rels in length: 2520 is the least common multiple of the integers 1 through 9. Thus, the time required to travel between two adjacent intersections is always an integer number of blips.

In all Gorelian cities, Government Housing is always at the northwest corner of the city, while the Government Building is always at the southeast corner. Streets between intersections might be one-way or two-way, or possibly even closed for repair (all this tinkering with traffic patterns causes a lot of accidents). Your job, given the details of speed limits, street directions, and street closures for a Gorelian city, is to determine the fastest route from Government Housing to the Government Building. (It is possible, due to street directions and closures, that no route exists, in which case a Gorelian Official Temporary Holiday is declared, and the Gorelian Officials take the day off.)

The picture above shows a Gorelian City marked with speed limits, one way streets, and one closed street. It is assumed that streets are always traveled at the exact posted speed limit, and that turning a corner takes zero time. Under these conditions, you should be able to determine that the fastest route from Government Housing to the Government Building in this city is 1715 blips. And if the next day, the only change is that the closed road is opened to two way traffic at 9 rels per blip, the fastest route becomes 1295 blips. On the other hand, suppose the three one-way streets are switched from southbound to northbound (with the closed road remaining closed). In that case, no route would be possible and the day would be declared a holiday.

 

Input
The input consists of a set of cities for which you must find a fastest route if one exists. The first line of an input case contains two integers, which are the vertical and horizontal number of city blocks, respectively. The smallest city is a single block, or 1 by 1, and the largest city is 20 by 20 blocks. The remainder of the input specifies speed limits and traffic directions for streets between intersections, one row of street segments at a time. The first line of the input (after the dimensions line) contains the data for the northernmost east-west street segments. The next line contains the data for the northernmost row of north-south street segments. Then the next row of east-west streets, then north-south streets, and so on, until the southernmost row of east-west streets. Speed limits and directions of travel are specified in order from west to east, and each consists of an integer from 0 to 9 indicating speed limit, and a symbol indicating which direction traffic may flow. A zero speed limit means the road is closed. All digits and symbols are delimited by a single space. For east-west streets, the symbol will be an asterisk '*' which indicates travel is allowed in both directions, a less-than symbol '<' which indicates travel is allowed only in an east-to-west direction, or a greater-than symbol '>' which indicates travel is allowed only in a west-to-east direction. For north-south streets, an asterisk again indicates travel is allowed in either direction, a lowercase "vee" character 'v' indicates travel is allowed only in a north-to-south directions, and a caret symbol '^' indicates travel is allowed only in a south-to-north direction. A zero speed, indicating a closed road, is always followed by an asterisk. Input cities continue in this manner until a value of zero is specified for both the vertical and horizontal dimensions.

 

Output
For each input scenario, output a line specifying the integer number of blips of the shortest route, a space, and then the word "blips". For scenarios which have no route, output a line with the word "Holiday".

 

Sample Input

2 2
9 * 9 *
6 v 0 * 8 v
3 * 7 *
3 * 6 v 3 *
4 * 8 *
2 2
9 * 9 *
6 v 9 * 8 v
3 * 7 *
3 * 6 v 3 *
4 * 8 *
2 2
9 * 9 *
6 ^ 0 * 8 ^
3 * 7 *
3 * 6 ^ 3 *
4 * 8 *
0 0

 

Sample Output

1715 blips
1295 blips
Holiday

 

Source

 

Recommend
teddy
大家米睇条题目甘长,其实系多左一维既最短路水题…………
重点就系控制输入下标同埋储存方式……之后Dijkstra, Bellmen-Ford, Floyd, SPFA, A*随便用就可以AC。
今次惊奇甘样到左Rank5…………真系水到恒。尴尬
5 10SGetEternal{(。) 0MS 224K 2043B C++ 2011-08-01 23:54:06
4309587 2011-08-01 23:54:06 Accepted 2722 0MS 224K 2043 B C++ 10SGetEternal{(。)(。)}!
跟住就系一段比较长既代码,坐标控制慢慢睇吧,我都纠结左好耐嘎啦:

题目长,吾一定唔系水题…………
分享到:
评论

相关推荐

    hdu.rar_hdu

    HDU(杭州电子科技大学在线评测系统)是一个深受程序员喜爱的在线编程练习平台,它提供了丰富的算法题目供用户挑战,帮助他们提升编程技能和算法理解能力。"hdu.rar_hdu"这个压缩包文件很可能是某位程序员整理的他在...

    HDU_2010.rar_hdu 2010_hdu 20_hdu acm20

    【标题】"HDU_2010.rar"是一个压缩包文件,其中包含了与"HDU 2010"相关的资源,特别是针对"HDU ACM20"比赛的编程题目。"hdu 2010"和"hdu 20"可能是该比赛的不同简称或分类,而"hdu acm20"可能指的是该赛事的第20届...

    HDU题目java实现

    【标题】"HDU题目java实现"所涉及的知识点主要集中在使用Java编程语言解决杭州电子科技大学(HDU)在线评测系统中的算法问题。HDU是一个知名的在线编程竞赛平台,它提供了大量的算法题目供参赛者练习和提交解决方案...

    ACM HDU题目分类

    ACM HDU 题目分类 ACM HDU 题目分类是指对 HDU 在线判题系统中题目的分类,总结了大约十来个分类。这些分类将有助于编程选手更好地理解和解决问题。 DP 问题 DP(Dynamic Programming,动态规划)是一种非常重要...

    hdu1250高精度加法

    ### hdu1250高精度加法 #### 背景介绍 在计算机科学与编程竞赛中,处理大整数运算(特别是加法、减法、乘法等)是常见的需求之一。当数字的位数超过了标准数据类型(如`int`、`long`等)所能表示的最大值时,就需要...

    HDU DP动态规划

    【标题】"HDU DP动态规划"涉及到的是在算法领域中的动态规划(Dynamic Programming,简称DP)技术,这是解决复杂问题的一种高效方法,尤其适用于有重叠子问题和最优子结构的问题。动态规划通常用于优化多阶段决策...

    HDU1059的代码

    HDU1059的代码

    hdu1001解题报告

    hdu1001解题报告

    hdu 1574 passed sorce

    hdu 1574 passed sorce

    hdu.rar_HDU 1089.cpp_OJ题求和_hdu_horsekw5_杭电obj

    【标题】"hdu.rar_HDU 1089.cpp_OJ题求和_hdu_horsekw5_杭电obj" 提供的信息是关于一个压缩文件,其中包含了一个名为 "HDU 1089.cpp" 的源代码文件,这个文件是为了解决杭州电子科技大学(Hangzhou Dianzi ...

    hdu2101解决方案

    hdu2101AC代码

    ACM HDU

    【ACM HDU】指的是在ACM(国际大学生程序设计竞赛,International Collegiate Programming Contest)中,参赛者在杭州电子科技大学(Hangzhou Dianzi University,简称HDU)的在线评测系统上完成并已解决的题目集合...

    杭电ACMhdu1163

    【标题】:杭电ACMhdu1163 【描述】:这是一道源自杭州电子科技大学(Hangzhou Dianzi University,简称HDU)的ACM编程竞赛题目,编号为1163。这类问题通常需要参赛者利用计算机编程解决数学、逻辑或算法上的挑战,...

    hdu 5007 Post Robot

    hdu 5007 Post Robot 字符串枚举。 暴力一下就可以了。

    Hdu1000—2169部分代码

    HDU是杭州电子科技大学(Hangzhou Dianzi University)举办的一个在线编程竞赛平台,全称为HDU Online Judge。ACM是国际大学生程序设计竞赛(International Collegiate Programming Contest)的缩写,是一个全球性的...

    HDU acm-PPT课件

    【ACM入门与提高:HDU ACM竞赛课程详解】 ACM(国际大学生程序设计竞赛,International Collegiate Programming Contest,简称ICPC或ACM/ICPC)是一项全球性的竞赛,旨在激发大学生对计算机科学的兴趣,提升他们的...

    hdu acm1166线段树

    hdu 1166线段树代码

    HDU最全ac代码

    HDU(Hangzhou Dianzi University)是国内外知名的在线编程竞赛平台,主要服务于ACM/ICPC(国际大学生程序设计竞赛)以及相关的算法训练。"HDU最全ac代码"这个压缩包很可能是包含了在HDU平台上解题通过的完整源代码...

    hdu动态规划算法集锦

    根据提供的信息,我们可以总结出以下关于“hdu动态规划算法集锦”的知识点: ### 动态规划基础概念 动态规划是一种解决多阶段决策问题的方法,它通过将原问题分解为互相重叠的子问题,利用子问题的解来构建原问题...

    HDU.rar_hdu_hdu07_com_shownv9b_www.563hdu.

    2. **编程挑战与解决方案**:压缩包中的源代码文件可能是参赛者或学习者提交的解决方案,涵盖了多种编程语言,如C、C++、Java等。这些代码可以帮助学习者理解不同的解题思路和编程技巧。 3. **算法与数据结构**:...

Global site tag (gtag.js) - Google Analytics