• <ins id="pjuwb"></ins>
    <blockquote id="pjuwb"><pre id="pjuwb"></pre></blockquote>
    <noscript id="pjuwb"></noscript>
          <sup id="pjuwb"><pre id="pjuwb"></pre></sup>
            <dd id="pjuwb"></dd>
            <abbr id="pjuwb"></abbr>
            posts - 74,  comments - 33,  trackbacks - 0
            Islands and Bridges
            Time Limit: 4000MS Memory Limit: 65536K
            Total Submissions: 2930 Accepted: 723

            Description

            Given a map of islands and bridges that connect these islands, a Hamilton path, as we all know, is a path along the bridges such that it visits each island exactly once. On our map, there is also a positive integer value associated with each island. We call a Hamilton path the best triangular Hamilton path if it maximizes the value described below.

            Suppose there are n islands. The value of a Hamilton path C1C2...Cn is calculated as the sum of three parts. Let Vi be the value for the island Ci. As the first part, we sum over all the Vi values for each island in the path. For the second part, for each edge CiCi+1 in the path, we add the product Vi*Vi+1. And for the third part, whenever three consecutive islands CiCi+1Ci+2 in the path forms a triangle in the map, i.e. there is a bridge between Ci and Ci+2, we add the product Vi*Vi+1*Vi+2.

            Most likely but not necessarily, the best triangular Hamilton path you are going to find contains many triangles. It is quite possible that there might be more than one best triangular Hamilton paths; your second task is to find the number of such paths.

            Input

            The input file starts with a number q (q<=20) on the first line, which is the number of test cases. Each test case starts with a line with two integers n and m, which are the number of islands and the number of bridges in the map, respectively. The next line contains n positive integers, the i-th number being the Vi value of island i. Each value is no more than 100. The following m lines are in the form x y, which indicates there is a (two way) bridge between island x and island y. Islands are numbered from 1 to n. You may assume there will be no more than 13 islands.

            Output

            For each test case, output a line with two numbers, separated by a space. The first number is the maximum value of a best triangular Hamilton path; the second number should be the number of different best triangular Hamilton paths. If the test case does not contain a Hamilton path, the output must be `0 0'.

            Note: A path may be written down in the reversed order. We still think it is the same path.

            Sample Input

            2
            3 3
            2 2 2
            1 2
            2 3
            3 1
            4 6
            1 2 3 4
            1 2
            1 3
            1 4
            2 3
            2 4
            3 4
            

            Sample Output

            22 3
            69 1
            以前做本校的1005的時(shí)候,其中就用到TSP,當(dāng)然KM也能正確求解,暴搜更是無敵!
            現(xiàn)在這是一道變形的TSP,搞清題目意思就很容易求解,不幸的是在統(tǒng)計(jì)路徑的時(shí)候,我居然
            腦殘的sum++,而應(yīng)該是sum+=dpways[(1<<n)-1][i][j];因此白白的貢獻(xiàn)了N個(gè)WA,
            腦殘人士!請(qǐng)見諒!
            代碼很慢,735ms,不貼了!
            -------------------------------------------------------------------------------------------
            上課去了?。?!
            posted on 2009-03-26 09:56 KNIGHT 閱讀(124) 評(píng)論(0)  編輯 收藏 引用

            只有注冊(cè)用戶登錄后才能發(fā)表評(píng)論。
            網(wǎng)站導(dǎo)航: 博客園   IT新聞   BlogJava   博問   Chat2DB   管理


            <2009年3月>
            22232425262728
            1234567
            891011121314
            15161718192021
            22232425262728
            2930311234

            常用鏈接

            留言簿(8)

            隨筆檔案

            文章檔案

            Friends

            OJ

            搜索

            •  

            最新評(píng)論

            閱讀排行榜

            評(píng)論排行榜

            亚洲国产高清精品线久久| 一本久久知道综合久久| 久久久久无码专区亚洲av| 伊人久久无码精品中文字幕| 久久人爽人人爽人人片AV| 久久精品国产精品亜洲毛片| 亚洲∧v久久久无码精品| 国产激情久久久久影院小草 | 久久久久综合中文字幕| 亚洲va久久久噜噜噜久久天堂| 99久久人人爽亚洲精品美女| 亚洲AV无码久久精品成人| 色播久久人人爽人人爽人人片aV | 久久久这里有精品| 国产成人久久777777| 久久久久久午夜成人影院| 久久久国产亚洲精品| 久久久久久噜噜精品免费直播| 久久国产乱子伦免费精品| 无码AV波多野结衣久久| 中文国产成人精品久久亚洲精品AⅤ无码精品 | 久久精品中文字幕一区| 久久免费视频一区| 久久久久久一区国产精品| 久久综合狠狠色综合伊人| 东京热TOKYO综合久久精品| 无码人妻精品一区二区三区久久| 久久精品中文字幕大胸| 久久天天躁狠狠躁夜夜2020老熟妇 | 午夜天堂av天堂久久久| 日本五月天婷久久网站| 久久国产AVJUST麻豆| 一本一道久久a久久精品综合 | 国产精品热久久无码av| 国产亚州精品女人久久久久久| 青青草国产精品久久| 91精品久久久久久无码| 久久久久亚洲AV综合波多野结衣 | 色欲综合久久躁天天躁蜜桃| 久久久久免费看成人影片| 97久久久精品综合88久久|