PAT/source/html/b1075.html

链表元素分类
<div class="ques-view"><p>给定一个单链表，请编写程序将链表元素进行分类排列，使得所有负值元素都排在非负值元素的前面，而 [0, K] 区间内的元素都排在大于 K 的元素前面。但每一类内部元素的顺序是不能改变的。例如：给定链表为 18→7→-4→0→5→-6→10→11→-2，K 为 10，则输出应该为 -4→-6→-2→7→0→5→10→18→11。</p>
<h3 id="-">输入格式：</h3>
<p>每个输入包含一个测试用例。每个测试用例第 1 行给出：第 1 个结点的地址；结点总个数，即正整数N (<span class="katex"><span class="katex-mathml"><math><mrow><mo>≤</mo><mn>1</mn><msup><mn>0</mn><mn>5</mn></msup></mrow>\le 10^5</math></span><span aria-hidden="true" class="katex-html"><span class="strut" style="height:0.8141079999999999em;"></span><span class="strut bottom" style="height:0.950078em;vertical-align:-0.13597em;"></span><span class="base textstyle uncramped"><span class="mrel">≤</span><span class="mord mathrm">1</span><span class="mord"><span class="mord mathrm">0</span><span class="msupsub"><span class="vlist"><span style="top:-0.363em;margin-right:0.05em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span><span class="reset-textstyle scriptstyle uncramped mtight"><span class="mord mathrm mtight">5</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span>​</span></span></span></span></span></span></span>)；以及正整数K (<span class="katex"><span class="katex-mathml"><math><mrow><mo>≤</mo><mn>1</mn><msup><mn>0</mn><mn>3</mn></msup></mrow>\le 10^3</math></span><span aria-hidden="true" class="katex-html"><span class="strut" style="height:0.8141079999999999em;"></span><span class="strut bottom" style="height:0.950078em;vertical-align:-0.13597em;"></span><span class="base textstyle uncramped"><span class="mrel">≤</span><span class="mord mathrm">1</span><span class="mord"><span class="mord mathrm">0</span><span class="msupsub"><span class="vlist"><span style="top:-0.363em;margin-right:0.05em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span><span class="reset-textstyle scriptstyle uncramped mtight"><span class="mord mathrm mtight">3</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span>​</span></span></span></span></span></span></span>)。结点的地址是 5 位非负整数，NULL 地址用 <span class="katex"><span class="katex-mathml"><math><mrow><mo>−</mo><mn>1</mn></mrow>-1</math></span><span aria-hidden="true" class="katex-html"><span class="strut" style="height:0.64444em;"></span><span class="strut bottom" style="height:0.72777em;vertical-align:-0.08333em;"></span><span class="base textstyle uncramped"><span class="mord">−</span><span class="mord mathrm">1</span></span></span></span> 表示。</p>
<p>接下来有 N 行，每行格式为：</p>
<pre><code>Address Data Next
</code></pre><p>其中 <code>Address</code> 是结点地址；<code>Data</code> 是该结点保存的数据，为 <span class="katex"><span class="katex-mathml"><math><mrow><mo>[</mo><mo>−</mo><mn>1</mn><msup><mn>0</mn><mn>5</mn></msup><mo separator="true">,</mo><mn>1</mn><msup><mn>0</mn><mn>5</mn></msup><mo>]</mo></mrow>[-10^5, 10^5]</math></span><span aria-hidden="true" class="katex-html"><span class="strut" style="height:0.8141079999999999em;"></span><span class="strut bottom" style="height:1.064108em;vertical-align:-0.25em;"></span><span class="base textstyle uncramped"><span class="mopen">[</span><span class="mord">−</span><span class="mord mathrm">1</span><span class="mord"><span class="mord mathrm">0</span><span class="msupsub"><span class="vlist"><span style="top:-0.363em;margin-right:0.05em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span><span class="reset-textstyle scriptstyle uncramped mtight"><span class="mord mathrm mtight">5</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span>​</span></span></span></span><span class="mpunct">,</span><span class="mord mathrm">1</span><span class="mord"><span class="mord mathrm">0</span><span class="msupsub"><span class="vlist"><span style="top:-0.363em;margin-right:0.05em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span><span class="reset-textstyle scriptstyle uncramped mtight"><span class="mord mathrm mtight">5</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;">​</span></span>​</span></span></span></span><span class="mclose">]</span></span></span></span> 区间内的整数；<code>Next</code> 是下一结点的地址。题目保证给出的链表不为空。</p>
<h3 id="-">输出格式：</h3>
<p>对每个测试用例，按链表从头到尾的顺序输出重排后的结果链表，其上每个结点占一行，格式与输入相同。</p>
<h3 id="-">输入样例：</h3>
<pre><code class="lang-in">00100 9 10
23333 10 27777
00000 0 99999
00100 18 12309
68237 -6 23333
33218 -4 00000
48652 -2 -1
99999 5 68237
27777 11 48652
12309 7 33218
</code></pre>
<h3 id="-">输出样例：</h3>
<pre><code class="lang-out">33218 -4 68237
68237 -6 48652
48652 -2 12309
12309 7 00000
00000 0 99999
99999 5 23333
23333 10 00100
00100 18 27777
27777 11 -1
</code></pre>
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