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* PUSH NOTE : 树形DP.md * PUSH NOTE : GoodbyeOI.md * PUSH NOTE : 小草和柠檬绿.md * PUSH ATTACHMENT : Pasted image 20241215230156.webp * PUSH ATTACHMENT : Pasted image 20241215230541.webp * PUSH ATTACHMENT : Pasted image 20241215230601.webp * PUSH NOTE : 高斯消元.md * PUSH NOTE : 行列式.md * DELETE FILE : docs/OI/DP/树形dp.md * DELETE FILE : docs/assets/img/Pasted image 20240812033217.png * DELETE FILE : docs/assets/img/Pasted image 20240812033251.png * DELETE FILE : docs/assets/img/Pasted image 20240812033308.png
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@@ -27,4 +27,4 @@ $N \times N$ 方阵行列式可以理解为所有列向量张成的几何体的 | |
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## 求解 | ||
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![[高斯消元#求行列式|高斯消元 > 求行列式]] | ||
[[高斯消元#求行列式|高斯消元 > 求行列式]] |
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@@ -233,7 +233,6 @@ void gauss(int n) { | |
[[线性基|线性基]] | ||
## 求异或方程组 | ||
#待完成 | ||
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--- | ||
tags: | ||
- 回忆 | ||
date: 2023-11-18 | ||
publish: true | ||
--- | ||
# GoodbyeOI | ||
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终于退役了。把noip打成跟春测一样随机得分也是没谁了。经验教训啥的在后面,前面的碎碎念就跳过去吧。 | ||
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## Before OI | ||
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首先的首先,能支持我走到今天,要感谢咱们学校的教练团队,我的父母,还有我的队友。尽管每次正式比赛成绩都很拉胯,也没有学长他们那样优秀,但你们仍然坚定不移的鞭策着、支持着,让我不断成长。 | ||
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~~说来惭愧,我的洛谷号早在2018年暑假就注册了。~~至于为啥,那是因为小五的时候跑去搞了个什么机器人比赛,然后长途火车上遇到一哥们在用mac打题。当时凑过去看的时候,人家就给介绍了洛谷(当时没网,等我想起来注册已经小六2018了) | ||
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小四时候会的C语法(甚至指针),那年暑假写了几道语法题,就这当时还调了好久好久,然后就放弃了……算法什么的更别提了,会不了一点。(想当年还是洛谷试炼场啊,~~历史的眼泪~~) | ||
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坐标SN,这里所有的教育资源基本都垄断在西安。而生在西安外的我,根本就没有什么途径详细了解OI这玩意儿——五大竞赛,光听过数学竞赛的名字。编程这玩意儿,纯纯当个兴趣,也没打算高中搞竞赛来着。 | ||
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初中更别提了,小地方的初中就像是文化课集中营,拔尖的学生啥都不让搞,让你一心一意整文化课,挤破头往西安钻。连一点竞赛要早点开整的意识都没有。 | ||
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结果最后中考语文挂的惨烈,要不是硬被我妈拉着到【数据删除】考自招,我那个分数根本进不了【数据删除】,也根本不会有竞赛的机会。 | ||
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新生夏令营,要求每个人都要选个竞赛试试。【数据删除】22年竞赛成绩还行,然后几个竞赛老师上去吹得天花乱坠,相互开炮,场面一度十分壮观。然而独独没有信息——毕竟建校至今一块金牌也没出过……(当然也有其他原因,就不细说了) | ||
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于是乎,成功将我误导以为【数据删除】没有信息竞赛(毕竟冷门一些),反手去报了物竞,学了一个暑假的微积分+部分高中物理,结果最后连个 $sin(x)$ 怎么积都没记住。这个暑假是真的玩high了。 | ||
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结果开学军训的时候,班里有一个原来初中搞OI的,遂交流甚欢。~~(这个时候我才知道洛谷的题目分级、名字颜色啥的)~~于是一开学就转去了信息,毕竟比起物理我更喜欢跟电脑打交道一些。 | ||
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## Begin | ||
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毕竟原来学过语法,问清楚,买了本深基入门,每次上课硬啃。机房最后面总会有一个人默默做题,一看发现在板刷蓝色大dp,吓得我们几个萌新瑟瑟发抖(这就是马老师 \%\%\%) | ||
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一个月差不多就能切黄的了,然后是搜索,高精,拓扑排序啥的。疫情网课zt讲的dp,照着贺了几份背包。两三个月差不多把入门组学完了,但不精,题做的不多。 | ||
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然后刘老师告诉我们要分班,抽出来我们6个让波波带。疫情在家也没咋整竞赛,文化课也没咋整,但至少刷简单题还是很有热情的。 | ||
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寒假主要学的图论,系统刷dp的题(大部分是贺的……)这时候马老师每天效率拉满,一个寒假把hzoj上的提高知识点复习完,开始学省选…… | ||
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而我们第二学期才开始进入提高,学树状数组、线段树、tarjan、LCA……这才慢慢见识到OI的恐怖面貌。 | ||
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就在刚学完线段树的下个周末,春测开始了。打的很唐,80+二等,连另一个班的都没考过,更别提【数据删除】的”初中“了。 | ||
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到期中的时候,除了字符串(这玩意儿弱省选手怎么可能会的啊),基本上就差数论和组合数那部分了。当初选出的6人,减掉去国外的,剩下的因为期中成绩和竞赛难度的双重影响选择了退役……每天的晚自习就只剩下马老师和我了。 | ||
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后面一个多月先是准备学考,然后赶在去巴蜀前勉强补完了提高的数学。但都不算精,上思维难度的基本都是贺的。最震撼的是,在出发前马老师向我展示了他切的紫题们,让我随便点,说保证5s之内看出是啥。 | ||
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然后就是暑期集训,去巴蜀被吊打——先板刷一个月题,补充noip知识点,再模拟赛海一个月。虽然学了点省选,但不多,约等于0。不过思维技巧码力和考场策略提升是立竿见影的。 | ||
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九月份回来学一个月文化课,停课到noip。依旧是模拟赛海。最高光也许是csp-s,但仍然打的很唐,卡常+读错题仍然没能打过初中选手……然后就没有然后了,noip完滚粗文化课了。 | ||
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