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<div id="Layer1" style="position:absolute; width:711px; height:21px; z-index:1; top: 10px; background-color: #CCCCCC; layer-background-color: #CCCCCC; border: 1px none #000000; left: 26px"><b>|</b><font face="宋体" size="2"><a href="../text1/text1-0.htm">第一章</a></font><b>|</b><font face="宋体" size="2"><a href="../text2/text2-0.htm">第二章</a></font><b>|</b><font face="宋体" size="2"><a href="../text3/text3-0.htm">第三章</a></font><b>|</b><font face="宋体" size="2"><a href="../text4/text4-0.htm">第四章</a></font><b>|</b><font face="宋体" size="2"><a href="../text5/text5-0.htm">第五章</a></font><b>|</b><font face="宋体" size="2"><a href="../text6/text6-0.htm">第六章</a></font><b>|</b><font face="宋体" size="2"><a href="../text7/text7-0.htm">第七章</a></font><b>|</b><font face="宋体" size="2"><a href="../text8/text8-0.htm">第八章</a></font><b>|</b><font face="宋体" size="2"><a href="../text9/text9-0.htm">第九章</a></font><b>|</b><font face="宋体" size="2"><a href="../text10/text10-0.htm">第十章</a></font><b>|</b><font size="2" face="宋体">算法分析<b><font color="#000000">|</font></b>
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<font size="4" color="#FF0033">方法2：<font color="#000000">每行</font></font><font size="4" color="#000000">、</font><font size="4">每列都取二条边，每边为最小、次小边，且构成一条周
游路线一条周游路线，这种结果总cost 几乎是最小的。
以无向图为例，选择（v，w）等于(w，v)也选定，即一条边当看成
二条边。</font></b></font></pre>
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<pre><font face="宋体" color="#000000"><b><font size="4">
∞ 47 15 37 11 7
47 </font><font face="宋体" color="#000000"><b><font size="4">∞</font></b></font><font size="4"> 31 19 23 8
15 31 ∞ 16 63 27
37 19 16 ∞ 13 22
11 23 63 13 ∞ 6
7 8 27 22 6 ∞
<font color="#FF0033"> [Cij]</font>
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<pre><b><font face="宋体" size="4" color="#FF0033">①</font><font face="宋体" size="4" color="#000000">每行找cost 小的二边，加上标记
<font color="#FF0033">②</font>对称元素也标上
<font color="#FF0033">③</font>扫描各行加标元素个数=2的行中，
加标元素为选定边>2，删去大的，
只留下2个。删除时，如果其列只有
二个元素的， 要保留。
<font color="#FF0033">④</font>每行（或每列）只剩两个加标元素。
<font color="#FF0033">⑤</font>检查是否成圈，如为几个子圈，则
合一。</font></b></pre>
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<pre><font face="宋体" color="#000000"><b><font size="4">∞ 47 <font face="Arial, Helvetica, sans-serif" color="#0033CC">15</font> 37 <font face="Arial, Helvetica, sans-serif" color="#FF0000">11</font> <font color="#FF0000" face="Arial, Helvetica, sans-serif">7 </font>
47 </font><font face="宋体" color="#000000" size="4"><b>∞</b></font><font size="4"> 31 <font face="Arial, Helvetica, sans-serif" color="#FF0000">19</font> 23 <font face="Arial, Helvetica, sans-serif" color="#FF0000">8</font>
<font face="Arial, Helvetica, sans-serif" color="#FF0000">15</font> 31 ∞ <font face="Arial, Helvetica, sans-serif" color="#FF0000">16 </font> 63 27
37 <font face="Arial, Helvetica, sans-serif" color="#0033CC">19</font> <font face="Arial, Helvetica, sans-serif" color="#0033CC">16</font> ∞ <font face="Arial, Helvetica, sans-serif" color="#FF0000">13</font> 22
<font face="Arial, Helvetica, sans-serif" color="#0033CC">11</font> 23 63 <font face="Arial, Helvetica, sans-serif" color="#0033CC">13</font> ∞ <font face="Arial, Helvetica, sans-serif" color="#FF0000">6</font>
<font face="Arial, Helvetica, sans-serif" color="#0033CC">7</font> <font face="Arial, Helvetica, sans-serif" color="#0033CC">8</font><font color="#0033CC"> </font> 27 22 <font face="Arial, Helvetica, sans-serif" color="#0033CC">6</font> ∞</font><font size="4">
<font color="#FF0033"> [Cij]</font> </font></b></font></pre>
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<pre><font face="宋体" color="#000000"><b><font face="宋体" color="#000000"><b><font size="4">∞ 47 <font face="Arial, Helvetica, sans-serif" color="#FF0000">15</font> 37 <font face="Arial, Helvetica, sans-serif" color="#FF0033">11</font> <font face="Arial, Helvetica, sans-serif">7 </font>
47 <b>∞</b> 31 <font face="Arial, Helvetica, sans-serif" color="#FF0000">19</font> 23 <font face="Arial, Helvetica, sans-serif" color="#FF0033">8</font>
<font face="Arial, Helvetica, sans-serif" color="#FF0000">15</font> 31 ∞ <font face="Arial, Helvetica, sans-serif" color="#FF0000">16</font><font face="Arial, Helvetica, sans-serif"> </font> 63 27
37 <font face="Arial, Helvetica, sans-serif" color="#FF0033">19</font> <font face="Arial, Helvetica, sans-serif" color="#FF0000">16</font><font color="#FF0000"> </font> ∞ <font face="Arial, Helvetica, sans-serif">13</font> 22
<font face="Arial, Helvetica, sans-serif" color="#FF0000">11 </font> 23 63 <font face="Arial, Helvetica, sans-serif">13</font> ∞ <font face="Arial, Helvetica, sans-serif" color="#FF0000">6</font>
<font face="Arial, Helvetica, sans-serif">7</font> <font face="Arial, Helvetica, sans-serif" color="#FF0033">8</font> 27 22 <font face="Arial, Helvetica, sans-serif" color="#FF0000">6</font> ∞</font></b></font><font size="4">
<font color="#FF0033"> [Cij]</font> </font></b></font></pre>
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<p><b><font color="#FF0000">13, 11 ,7 所在行、列加标元素>２ <font color="#000000">(11不能取，因为第6行要有>2个加标元素，所以只能去7）</font></font></b></p>
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<pre><font face="宋体" color="#000000"><b><font face="宋体" color="#000000"><b><font size="4" color="#FF0033">①
②
③
④
⑤
⑥</font></b></font></b></font> </pre>
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<pre><font face="宋体" color="#000000"><b><font face="宋体" color="#000000"><b><font size="4" color="#FF0033"> ① ② ③ ④ ⑤ ⑥</font></b></font><font size="4">
∞ 47 <font color="#3333FF">15</font> 37 <font color="#FF0033"> 11 </font> 7<font color="#FF0033"> </font>
47 </font><font face="宋体" color="#000000"><b><font size="4">∞</font></b></font><font size="4"> 31 <font color="#FF0033">19 </font> 23 <font color="#0033CC">8</font>
<font color="#FF3366">15</font> 31 ∞ <font color="#3333FF">16</font> 63 27
37 <font color="#0033CC">19</font> <font color="#CC0000">16 </font> ∞ <font color="#333333">13</font> 22
<font color="#0000FF">11</font> 23 63 <font color="#333333">13</font> ∞ <font color="#FF0033">6</font>
7 <font color="#CC0000">8 </font> 27 22 <font color="#0033CC">6</font> ∞
</font></b></font></pre>
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