<html xmlns="http://www.w3.org/1999/xhtml"><head><meta charset="utf-8"><meta name="generator" content="pdf2htmlEX"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><link rel="stylesheet" href="https://csdnimg.cn/release/download_crawler_static/css/base.min.css"><link rel="stylesheet" href="https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css"><link rel="stylesheet" href="https://csdnimg.cn/release/download_crawler_static/16161011/raw.css"><script src="https://csdnimg.cn/release/download_crawler_static/js/compatibility.min.js"></script><script src="https://csdnimg.cn/release/download_crawler_static/js/pdf2htmlEX.min.js"></script><script>try{pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({});}catch(e){}</script><title></title></head><body><div id="sidebar" style="display: none"><div id="outline"></div></div><div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/16161011/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">填空题</div><div class="t m0 x2 h3 y2 ff1 fs1 fc0 sc0 ls0 ws0">问题描述</div><div class="t m0 x3 h4 y3 ff2 fs1 fc0 sc0 ls0 ws0">ASCII<span class="_ _0"> </span>码将每个字符对应到一个数值<span class="_ _1"></span>（编码）<span class="_ _1"></span>，<span class="_ _1"></span>用于信息的表示和传输。<span class="_ _1"></span>在</div><div class="t m0 x2 h4 y4 ff2 fs1 fc0 sc0 ls0 ws0">ASCII<span class="_ _0"> </span>码中，<span class="_ _2"></span>英文字母是按从小到大的顺序依次编码的，<span class="_ _2"></span>例如：<span class="_ _2"></span>字母<span class="_ _0"> </span>A<span class="_ _0"> </span>编码是</div><div class="t m0 x2 h4 y5 ff2 fs1 fc0 sc0 ls0 ws0">65,<span class="_ _0"> </span>字母<span class="_ _0"> </span>B<span class="_ _0"> </span>编码是<span class="_ _3"> </span>66，字母<span class="_ _3"> </span>C<span class="_ _0"> </span>编码是<span class="_ _0"> </span>67，请问字母<span class="_ _3"> </span>Q<span class="_ _0"> </span>编码是多少？</div><div class="t m0 x2 h3 y6 ff1 fs1 fc0 sc0 ls0 ws0">答案提交</div><div class="t m0 x3 h4 y7 ff2 fs1 fc0 sc0 ls0 ws0">这是一道结果填空的题，<span class="_ _4"></span>你只需要算出结果后提交即可。<span class="_ _4"></span>本题的结果为一个</div><div class="t m0 x2 h4 y8 ff2 fs1 fc0 sc0 ls0 ws0">整数，在提交答案时只填写这个整数，填写多余的内容将无法得分。</div><div class="t m0 x1 h2 y9 ff1 fs0 fc0 sc0 ls0 ws0">填空题</div><div class="t m0 x2 h3 ya ff1 fs1 fc0 sc0 ls0 ws0">问题描述</div><div class="t m0 x3 h4 yb ff2 fs1 fc0 sc0 ls0 ws0">请问在<span class="_ _3"> </span>1<span class="_ _0"> </span>到<span class="_ _0"> </span>2020<span class="_ _0"> </span>中，<span class="_ _5"></span>有多少个数与<span class="_ _3"> </span>2<span class="_ _6"></span>020<span class="_ _3"> </span>互质，<span class="_ _5"></span>即有多少个数与<span class="_ _0"> </span>20<span class="_ _6"></span>20</div><div class="t m0 x2 h4 yc ff2 fs1 fc0 sc0 ls0 ws0">的最大公约数为<span class="_ _3"> </span>1。</div><div class="t m0 x2 h3 yd ff1 fs1 fc0 sc0 ls0 ws0">答案提交</div><div class="t m0 x3 h4 ye ff2 fs1 fc0 sc0 ls0 ws0">这是一道结果填空的题，<span class="_ _4"></span>你只需要算出结果后提交即可。<span class="_ _4"></span>本题的结果为一个</div><div class="t m0 x2 h4 yf ff2 fs1 fc0 sc0 ls0 ws0">整数，在提交答案时只填写这个整数，填写多余的内容将无法得分。</div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">填空题</div></div><div class="pi" data-data='{"ctm":[1.611830,0.000000,0.000000,1.611830,0.000000,0.000000]}'></div></div></body></html>
<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/16161011/bg2.jpg"><div class="t m0 x2 h3 y11 ff1 fs1 fc0 sc0 ls0 ws0">问题描述</div><div class="t m0 x3 h4 y12 ff2 fs1 fc0 sc0 ls0 ws0">有一棵二叉树，一个由<span class="_ _7"> </span>2021<span class="_ _7"> </span>个结点，其中有<span class="_ _7"> </span>1000<span class="_ _7"> </span>个结点有两个子结点，</div><div class="t m0 x2 h4 y13 ff2 fs1 fc0 sc0 ls0 ws0">其他的结点有一个或者<span class="_ _7"> </span>0<span class="_ _7"> </span>个子结点。</div><div class="t m0 x3 h4 y14 ff2 fs1 fc0 sc0 ls0 ws0">请问，这棵二叉树有多少个叶结点？</div><div class="t m0 x2 h3 y15 ff1 fs1 fc0 sc0 ls0 ws0">答案提交</div><div class="t m0 x3 h4 y16 ff2 fs1 fc0 sc0 ls0 ws0">这是一道结果填空的题，<span class="_ _4"></span>你只需要算出结果后提交即可。<span class="_ _4"></span>本题的结果为一个</div><div class="t m0 x2 h4 y17 ff2 fs1 fc0 sc0 ls0 ws0">整数，在提交答案时只填写这个整数，填写多余的内容将无法得分。</div><div class="t m0 x1 h2 y18 ff1 fs0 fc0 sc0 ls0 ws0">填空题</div><div class="t m0 x2 h3 y19 ff1 fs1 fc0 sc0 ls0 ws0">问题描述</div><div class="t m0 x3 h4 y1a ff2 fs1 fc0 sc0 ls0 ws0">对于整数<span class="_ _3"> </span>v<span class="_ _0"> </span>和<span class="_ _0"> </span>p，定义<span class="_ _3"> </span>Pi<span class="_ _6"></span>erce<span class="_ _0"> </span>序列为：</div><div class="t m0 x3 h4 y1b ff2 fs1 fc0 sc0 ls0 ws0">a[1]<span class="_ _8"> </span>=<span class="_ _8"> </span>v</div><div class="t m0 x3 h4 y1c ff2 fs1 fc0 sc0 ls0 ws0">a[i]<span class="_ _8"> </span>=<span class="_ _8"> </span>p<span class="_ _8"> </span>%<span class="_ _8"> </span>a[i-1]</div><div class="t m0 x3 h4 y1d ff2 fs1 fc0 sc0 ls0 ws0">例如，当<span class="_ _3"> </span>v<span class="_ _8"> </span>=<span class="_ _8"> </span>8<span class="_ _6"></span>,<span class="_ _8"> </span>p<span class="_ _8"> </span>=<span class="_ _8"> </span>21<span class="_ _3"> </span>时，对应的<span class="_ _0"> </span>Pierce<span class="_ _0"> </span>序列为</div><div class="t m0 x3 h4 y1e ff2 fs1 fc0 sc0 ls0 ws0">a[1]<span class="_ _8"> </span>=<span class="_ _8"> </span>8</div><div class="t m0 x3 h4 y1f ff2 fs1 fc0 sc0 ls0 ws0">a[2]<span class="_ _8"> </span>=<span class="_ _8"> </span>5</div><div class="t m0 x3 h4 y20 ff2 fs1 fc0 sc0 ls0 ws0">a[3]<span class="_ _8"> </span>=<span class="_ _8"> </span>1</div><div class="t m0 x3 h4 y21 ff2 fs1 fc0 sc0 ls0 ws0">再往后计算，<span class="_ _9"></span>值变为<span class="_ _3"> </span>0<span class="_ _6"></span>，<span class="_ _9"></span>不在我们考虑的范围内。<span class="_ _9"></span>因此当<span class="_ _0"> </span>v<span class="_ _7"> </span>=<span class="_ _7"> </span>8,<span class="_ _7"> </span>p<span class="_ _7"> </span>=<span class="_ _7"> </span>21<span class="_ _0"> </span>时，</div><div class="t m0 x2 h4 y22 ff2 fs1 fc0 sc0 ls0 ws0">Pierce<span class="_ _0"> </span>序列的长度为<span class="_ _3"> </span>3。</div><div class="t m0 x3 h4 y10 ff2 fs1 fc0 sc0 ls0 ws0">当<span class="_ _3"> </span>p<span class="_ _0"> </span>一定时，对于不同的<span class="_ _0"> </span>v<span class="_ _3"> </span>值，Pi<span class="_ _6"></span>erce<span class="_ _0"> </span>序列的长度可能不同。当<span class="_ _3"> </span>p<span class="_ _8"> </span>=<span class="_ _8"> </span>8</div></div><div class="pi" data-data='{"ctm":[1.611830,0.000000,0.000000,1.611830,0.000000,0.000000]}'></div></div>
<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://csdnimg.cn/release/download_crawler_static/16161011/bg3.jpg"><div class="t m0 x2 h4 y11 ff2 fs1 fc0 sc0 ls0 ws0">时，若<span class="_ _3"> </span>1<=v<p，最长的<span class="_ _0"> </span>Pierce<span class="_ _0"> </span>序列出现在<span class="_ _3"> </span>v=13<span class="_ _a"> </span>时，为(13,<span class="_ _7"> </span>8,<span class="_ _7"> </span>5,<span class="_ _7"> </span>1)，长度</div><div class="t m0 x2 h4 y12 ff2 fs1 fc0 sc0 ls0 ws0">为<span class="_ _3"> </span>4。</div><div class="t m0 x3 h4 y13 ff2 fs1 fc0 sc0 ls0 ws0">当<span class="_ _3"> </span>p=2<span class="_ _6"></span>021<span class="_ _3"> </span>时，最长的<span class="_ _0"> </span>Pierce<span class="_ _0"> </span>序列出现在<span class="_ _0"> </span>v=1160<span class="_ _3"> </span>时，请问这个序列</div><div class="t m0 x2 h4 y14 ff2 fs1 fc0 sc0 ls0 ws0">有多长？</div><div class="t m0 x1 h2 y23 ff1 fs0 fc0 sc0 ls0 ws0">填空题</div><div class="t m0 x2 h3 y24 ff1 fs1 fc0 sc0 ls0 ws0">问题描述</div><div class="t m0 x3 h4 y25 ff2 fs1 fc0 sc0 ls0 ws0">在<span class="_ _3"> </span>Ex<span class="_ _6"></span>cel<span class="_ _3"> </span>中，第<span class="_ _0"> </span>1<span class="_ _3"> </span>列到第<span class="_ _0"> </span>26<span class="_ _0"> </span>列的列名依次为<span class="_ _0"> </span>A<span class="_ _0"> </span>到<span class="_ _3"> </span>Z，从第<span class="_ _0"> </span>27<span class="_ _0"> </span>列开</div><div class="t m0 x2 h4 y26 ff2 fs1 fc0 sc0 ls0 ws0">始，列名有两个字母组成，第<span class="_ _3"> </span>2<span class="_ _6"></span>7<span class="_ _3"> </span>列到第<span class="_ _0"> </span>702<span class="_ _0"> </span>列的列名依次为<span class="_ _3"> </span>AA<span class="_ _0"> </span>到<span class="_ _0"> </span>ZZ。</div><div class="t m0 x3 h4 y27 ff2 fs1 fc0 sc0 ls0 ws0">之后的列再用<span class="_ _3"> </span>3<span class="_ _0"> </span>个字母、4<span class="_ _0"> </span>个字母表示。</div><div class="t m0 x3 h4 y28 ff2 fs1 fc0 sc0 ls0 ws0">请问，第<span class="_ _3"> </span>2<span class="_ _6"></span>021<span class="_ _3"> </span>列的列名是什么？</div><div class="t m0 x2 h3 y29 ff1 fs1 fc0 sc0 ls0 ws0">答案提交</div><div class="t m0 x3 h4 y2a ff2 fs1 fc0 sc0 ls0 ws0">这是一道结果填空的题，<span class="_ _4"></span>你只需要算出结果后提交即可。<span class="_ _4"></span>本题的结果为一个</div><div class="t m0 x2 h4 y2b ff2 fs1 fc0 sc0 ls0 ws0">有大写字母组成的字符串，<span class="_ _4"></span>在提交答案时只填写这个字符串，<span class="_ _4"></span>填写多余的内容将</div><div class="t m0 x2 h4 y2c ff2 fs1 fc0 sc0 ls0 ws0">无法得分。</div><div class="t m0 x2 h5 y2d ff2 fs0 fc1 sc0 ls0 ws0">题目描述</div><div class="t m0 x2 h6 y2e ff1 fs2 fc2 sc0 ls0 ws0">问题描述</div></div><div class="pi" data-data='{"ctm":[1.611830,0.000000,0.000000,1.611830,0.000000,0.000000]}'></div></div>
