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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
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<p class="MsoNormal" style="line-height:15.0pt"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt">s
= </span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman";mso-font-kerning:8.0pt">-</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt">1 < 0<o:p>
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<p class="MsoNormal" style="line-height:15.0pt"><b style="mso-bidi-font-weight:
normal"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;
mso-font-kerning:8.0pt">return</span></b><span lang="EN-US" style="font-size:
9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt"> False<o:p>
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<td width="80" valign="top" style="width:60.0pt;border-top:none;border-left:none;
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<p class="MsoNormal" style="line-height:15.0pt"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt">Knap(3</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman";mso-font-kerning:8.0pt">-</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt">2, 1)<o:p>
</o:p>
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<td width="120" valign="top" style="width:90.0pt;border-top:none;border-left:
none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
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padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" style="line-height:15.0pt"><b style="mso-bidi-font-weight:
normal"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;
mso-font-kerning:8.0pt">return</span></b><span lang="EN-US" style="font-size:
9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt"> True, </span><span style="font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning:
8.0pt">打印</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:
12.0pt;mso-font-kerning:8.0pt">2<o:p>
</o:p>
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solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt"><o:p>
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt"><o:p>
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<td width="80" valign="top" style="width:60.0pt;border-top:none;border-left:none;
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<p class="MsoNormal" style="line-height:15.0pt"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt">Knap(1</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:宋体;
mso-hansi-font-family:"Times New Roman";mso-font-kerning:8.0pt">-</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt">1, 0)<o:p>
</o:p>
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<td width="120" valign="top" style="width:90.0pt;border-top:none;border-left:
none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
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padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" style="line-height:15.0pt"><b style="mso-bidi-font-weight:
normal"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;
mso-font-kerning:8.0pt">return</span></b><span lang="EN-US" style="font-size:
9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt"> True, </span><span style="font-size:9.0pt;mso-bidi-font-size:12.0pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning:
8.0pt">打印</span><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:
12.0pt;mso-font-kerning:8.0pt">1<o:p>
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt"><o:p>
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt"><o:p>
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<p class="MsoNormal" style="line-height:15.0pt"> <span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:
8.0pt"><o:p>
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<td width="80" valign="top" style="width:60.0pt;border-top:none;border-left:none;
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<p class="MsoNormal" style="line-height:15.0pt"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt">s
= 0<o:p>
</o:p>
</span></p>
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<td width="120" valign="top" style="width:90.0pt;border-top:none;border-left:
none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;
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padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" style="line-height:15.0pt"><b style="mso-bidi-font-weight:
normal"><span lang="EN-US" style="font-size:9.0pt;mso-bidi-font-size:12.0pt;
mso-font-kerning:8.0pt">return</span></b><span lang="EN-US" style="font-size:
9.0pt;mso-bidi-font-size:12.0pt;mso-font-kerning:8.0pt"> True<o:p>
</o:p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p>
</o:p>
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<p class="MsoNormal" style="line-height:15.0pt"><span lang="EN-US">2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">、</span><span style="font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning:
8.0pt">【解答】此为典型的回溯法问题。</span><span lang="EN-US" style="mso-font-kerning:8.0pt"><o:p>
</o:p>
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