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class="post-title__text">2019 CSP-S 复赛滚粗记</h1><div class="post-title__meta"><a href="/archives/2019/11/" class="post-meta__date button">2019-11-18</a> <span class="separate-dot"></span> <a href="/categories/%E6%B0%B4/" class="button"><span class="post-meta__cats">水</span></a><style>.post-meta__pv{color:var(--t-l);visibility:hidden;opacity:0;transition:.2s}</style><span class="separate-dot"></span> <span class="post-meta__pv"></span></div></div><aside class="post-side"><div class="post-side__toc"><div class="toc-title">文章目录</div><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#day-0"><span class="toc-text">Day 0</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#day-1"><span class="toc-text">Day 1</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#day-2"><span class="toc-text">Day 2</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#day"><span class="toc-text">Day ?</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%80%E7%82%B9%E6%84%9F%E6%83%B3"><span class="toc-text">一点感想</span></a></li></ol></div></aside><a class="btn-toc button" id="btn-toc" tabindex="0"><svg viewBox="0 0 1024 1024" width="32" height="32" xmlns="http://www.w3.org/2000/svg"><path d="M128 256h64V192H128zM320 256h576V192H320zM128 544h64v-64H128zM320 544h576v-64H320zM128 832h64v-64H128zM320 832h576v-64H320z" fill="currentColor"></path></svg></a><div class="toc-menus" id="toc-menus"><div class="toc-title">文章目录</div><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#day-0"><span class="toc-text">Day 0</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#day-1"><span class="toc-text">Day 1</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#day-2"><span class="toc-text">Day 2</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#day"><span class="toc-text">Day ?</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%80%E7%82%B9%E6%84%9F%E6%83%B3"><span class="toc-text">一点感想</span></a></li></ol></div><article class="post post__with-toc card"><div class="post__header"><div class="post__expire" id="post-expired-notify"><p><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" style="fill:#f5a623;stroke:#f5a623"><path fill-rule="evenodd" d="M8.893 1.5c-.183-.31-.52-.5-.887-.5s-.703.19-.886.5L.138 13.499a.98.98 0 0 0 0 1.001c.193.31.53.501.886.501h13.964c.367 0 .704-.19.877-.5a1.03 1.03 0 0 0 .01-1.002L8.893 1.5zm.133 11.497H6.987v-2.003h2.039v2.003zm0-3.004H6.987V5.987h2.039v4.006z"></path></svg> 本文最后更新于 <span id="expire-date"></span> 天前，文中部分描述可能已经过时。</p></div><script>(()=>{var e=Date.parse("2019-11-18"),t=(new Date).getTime(),t=Math.floor((t-e)/864e5);120<=t&&(document.querySelectorAll("#expire-date")[0].innerHTML=t,document.querySelectorAll("#post-expired-notify")[0].style.display="block")})()</script></div><div class="post__content"><html><head><script>var meting_api="https://api-v2.hans362.cn/vip/?server=:server&type=:type&id=:id&r=:r"</script><script class="meting-secondary-script-marker" src="/js/Meting.min.js"></script></head><body><p>又是篇迟到的游记～</p><p>这次是真的凉透了…（真的是真哒</p><p><img src="https://hans362-img.oss.0vv0.top/2019/11/24/boom.png?width=1920" class="lazy" data-srcset="https://hans362-img.oss.0vv0.top/2019/11/24/boom.png?width=1920" srcset="/loading.gif" alt=""></p><span id="more"></span><blockquote><p>海边有两棵树，树上吊死了很多人，一棵叫括号树，另一棵树上全是数。一个叫格雷的人种树，0种括号树，1种数字树（01按格雷码决定）。</p></blockquote><blockquote><p>校门外有两棵树，一棵叫括号树，靠近这棵树的人会被114514搞得浑身**。另一棵叫树上数，Emiya经常砍树枝烧火做饭，他凭借着自己精湛的厨艺，用一种烹饪方式和一种主要食材做出了998244353道菜。这两棵树都是格雷的马种的，他现在要求你求树的重心，求不出就把你划分了。</p></blockquote><p>欲知 CSP-S 2019 究竟发生了什么，请接着往下看～</p><h2 id="day-0"><a class="markdownIt-Anchor" href="#day-0"></a> Day 0</h2><p>上次初赛低分飘过后没有选择停掉文化课准备复赛，主要是因为不想影响到学习…</p><p>比赛前一周每天晚上就挤出2个小时到机房刷刷题，打打比赛</p><p>周五放学回家顾不上写作业了，把历年的 NOIP D1T1 模拟题刷了一遍练练手感，然后很早就睡啦～</p><h2 id="day-1"><a class="markdownIt-Anchor" href="#day-1"></a> Day 1</h2><p>这次复赛不在自己学校啦～要跑到挺远的科艺中心去考（据说kkk也在？）…所以没法睡懒觉了呢～</p><p>6点多起来按照惯例在洛谷上求了个签…是中吉～</p><p>提前半小时到了考点机房外发现门还没开…和监考老师在门外等了好久…</p><p>进去以后…和想象中差距还是很大的…</p><p>机房电脑是一台台并排放置的，没有学校里机房的那种升降板，眼睛一瞥可能就可以看到边上人的屏幕…</p><p>显示器的分辨率居然是1024*768？！我人都傻了…这和学校物理实验室的 DIS 计算机差不多</p><p>屏幕锁定解除后又把我惊到了…这 WinXP 是怎么回事！（不过仔细想想好像确实只是说提供 Windows 系统，没说是哪个版本的）</p><p>电脑上还安装了360…好在我瞬间想起了360可能会把编译好的程序给杀光，于是我立刻把360干掉了</p><p>仔细一看发现和通知上说的也有所出入，没有提供 Win 上的 NOI Linux 虚拟机供测试使用，考场上也有人问了，监考老师直接就说没有…需要用 Linux 必须在 Win 下保存在 D 盘后重启电脑…</p><p>开考前2分钟左右老师直接用极域把密码条发了下来～不用自己输密码，这点好评～</p><p>拿到题目建好文件夹，我开始读题…</p><p>乍一看就格雷码一道是我能做的，当时就傻乎乎地按照题目给的生成算法暴力模拟了一遍…结果居然写出了个 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>O</mi><mo stretchy="false">(</mo><msup><mi>N</mi><mn>3</mn></msup><mo stretchy="false">)</mo></mrow><annotation encoding="application/x-tex">O(N^3)</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1.064108em;vertical-align:-.25em"></span><span class="mord mathnormal" style="margin-right:.02778em">O</span><span class="mopen">(</span><span class="mord"><span class="mord mathnormal" style="margin-right:.10903em">N</span><span class="msupsub"><span class="vlist-t"><span class="vlist-r"><span class="vlist" style="height:.8141079999999999em"><span style="top:-3.063em;margin-right:.05em"><span class="pstrut" style="height:2.7em"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight">3</span></span></span></span></span></span></span></span><span class="mclose">)</span></span></span></span> 算法？！我一看 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>n</mi><mo>≤</mo><mn>64</mn></mrow><annotation encoding="application/x-tex">n \leq 64</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:.7719400000000001em;vertical-align:-.13597em"></span><span class="mord mathnormal">n</span><span class="mspace" style="margin-right:.2777777777777778em"></span><span class="mrel">≤</span><span class="mspace" style="margin-right:.2777777777777778em"></span></span><span class="base"><span class="strut" style="height:.64444em;vertical-align:0"></span><span class="mord">6</span><span class="mord">4</span></span></span></span> 这可要命了…但是当时我脑子一热，居然决定开始肝第二题？！</p><p>现在想想第一题就算不会更加优化的算法，暴力把 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>n</mi><mo>≤</mo><mn>10</mn></mrow><annotation encoding="application/x-tex">n \leq 10</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:.7719400000000001em;vertical-align:-.13597em"></span><span class="mord mathnormal">n</span><span class="mspace" style="margin-right:.2777777777777778em"></span><span class="mrel">≤</span><span class="mspace" style="margin-right:.2777777777777778em"></span></span><span class="base"><span class="strut" style="height:.64444em;vertical-align:0"></span><span class="mord">1</span><span class="mord">0</span></span></span></span> 的情况打个表也有50分了啊…我居然把大面积 TLE 的程序交上去了，哭T﹏T</p><p>第二题肝了半天也没有肝出来，卡在括号匹配上了…最后估计能拿个5分暴力</p><p>第三题直接放弃（居然是道黑题！），输出样例试人品</p><p>Day 1 就这么结束了，出了考场大家都开始骂出题人了…</p><p>信竞老师让咱们考完就放掉，好好休息</p><p>回到家开始写作业，然后继续早早地睡了</p><h2 id="day-2"><a class="markdownIt-Anchor" href="#day-2"></a> Day 2</h2><p>只有 Emiya家今天的饭 这道看得懂…我裂开了</p><p>突然开始怀念 Day 1 的难度…</p><p>今天三道全是涉及到动态规划的，全不会做，凉了</p><p>后来证明是两紫一黑</p><p>T1 打了暴力确实能拿点分</p><p>后两道就继续打样例拼人品啦～</p><p>考完出来心里凉透了，我怕不是要爆零了</p><p>这 CSP 真的和 NOIP 无任何关系…难度相差的不是一点点</p><p>当晚肝完作业后发现洛谷上好像已经能测民间数据了…</p><h2 id="day"><a class="markdownIt-Anchor" href="#day"></a> Day ?</h2><p>忘了哪一天了选手程序下发（不像某省居然能把选手代码全部弄丢？！）</p><p>我鼓起勇气洛谷上测了一下，结果呢… D1 爆零（没错格雷码那道题全部 TLE ），D2T1 就拿了8分…</p><p>结果非常的难看…</p><p>后来又去牛客上测了一下，D1+D2 32 分，信奥题库上测了一下 48 分，不知道从哪搞来的民间数据 41 分，总之是这次真的爆炸了</p><p>不过咱组里也有200+的巨佬呢～好厉害～（我再次拉低平均水平）</p><p>组里高一有一位选手格雷码那题本来可以 AC 的…结果！他！竟然！把 freopen 给注释掉了！</p><p>结果直接100分变0分，好可惜啊…</p><h2 id="一点感想"><a class="markdownIt-Anchor" href="#一点感想"></a> 一点感想</h2><p>这次是我人生中第一次参加信息竞赛，虽然说是白忙活了2个半天和浪费了480块钱，不过至少是感受了比赛的氛围，熟悉了场地和流程</p><p>即使没有取得理想的成绩，又如何呢？毕竟，搞 OI 是为了那份热爱，而不是为了拿个多么好的奖，对吧？</p><p>接下来要从头开始，扎扎实实地继续努力了呢～</p><p>明年，我还会再来哒～</p></body></html></div><div class="license"><div class="license-title">2019 CSP-S 复赛滚粗记</div><div class="license-link"><a href="https://blog.hans362.cn/post/2019-csp-s-2/">https://blog.hans362.cn/post/2019-csp-s-2/</a></div><div class="license-meta"><div 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