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<title>●试题五</title>
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<body lang=ZH-CN style='tab-interval:21.0pt;text-justify-trim:punctuation'>
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<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>●试题五<span
lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>阅读下列程序说明和</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>C</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>代码，将应填入</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>(n)</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>处的字句写在答题纸的对应栏内。<span
lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>【程序</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>5</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>说明】<span
lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>著名的四色定理指出任何平面区域图均可用四种颜色着色，使相邻区域着不同的颜色。本程序对给定的区域图找出所有可能的不超过四种颜色的着色方案。<span
lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>程序中用</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>1~4</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>表示四种颜色。要着色的</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>N</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>个区域用</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>0~N-1</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>编号，区域相邻关系用</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>adj</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>［］［］矩阵表示，矩阵的</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>行</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>j</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>列的元素为</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>1</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>，表示区域</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>与区域</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>j</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>相邻；矩阵的</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>行</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>j</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>列的元素为</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>0</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>，表示区域</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>与区域</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>j</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>不相邻。数组</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>color</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>［］用来存储着色结果，</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>color</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>［</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>］的值为区域</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>所着颜色。<span
lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>【程序</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>5</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>】<span
lang=EN-US><o:p></o:p></span></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>#include<stdio.h><o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>#define N 10<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>void output(int color</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>［］</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>)/*</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>输出一种着色方案</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>*/<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:
"Times New Roman"'>{</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>int
i;<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>for(i=0;i<N;i++)<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>printf("%4d"</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>，</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>color</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>［</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>i</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>］</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>);<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>printf("</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>＼</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>n");<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:
"Times New Roman"'>}<o:p></o:p></span></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>int back(int*ip,int color</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>［］</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>)/*</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"'>回溯</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>*/<o:p></o:p></span></p>
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