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To Be An AC Man
code6
2014.4.8
应邀来跟⼩小伙伴们来讲讲我作为⼀一个 acmer 给⼤大家在 acm 的道路上的⼀一点建议.!
作为⼀一个⽼老牌并且还坚持刷题的acmer,我的⼝口号是 “To be an ac man”, 我想,不⽌止在竞赛,在后续的⼯工作,未来的⽣生活的当中,⽆无论遇到多⼤大的挑战,我们都希望能够顺利地攻克,ac它,
成为⼀一个 ac man. 谋事在⼈人,成事在天。我们把⾃自⼰己的那部分做⾜足做好,剩下的就不⽤用管了。当然,我们怎么做能够更有效率,能够使上劲,这是需要斟酌的事情,这就是我要给⼤大家的
tips。
关于我
• 07年软件⼯工程本科
• coder profile
• topcoder (1862/125)
• coderforce(1713/23)
• pku/fzu(283/224)
• ⽐比赛历史
• sonic(08, 1B), acorz(09, 1S/1G/1H), Goldbach(10, 1B/1G)
• ⼯工作历史
• meituan (2011 ~ )
• blog
简单介绍⼀一下我⾃自⼰己。
议题
• 如何做⼀一个好的acmer
两个冗⻓长的标题,说着我要做的两件事,⾄至于为啥⽤用英语呢?练习= = !
⾸首先我想从我的⼈人认知范围内聊聊如何成为⼀一个好的acmer,⼤大概有⼏几点,我说着说着可能串了,重了,也许是⽼老⽣生常谈,会⽐比较虚,⼤大家听听即可,还得⾃自⼰己辨别。!
其次还是从我的⾓角度,想跟⼤大家聊聊我总结的给acmer的关于⼯工作的建议,都是⼀一些个⼈人想法,靠不靠谱,⼤大家各⾃自甄别。
如何做⼀一个好的acmer
态度
“为什么切题,打⽐比赛?”
“因为有趣。”
我认为态度是⾸首要的,我们搞竞赛为的是什么,这个最开始得想清楚。不可否认我们都希望能搞出⼀一⽚片名堂,能赛出好成绩。结果固然重要,但我们不能忽视过程。那如何保持我们在过程的
积极性呢,我们得享受过程。我们得培养对这些题⺫⽬目,⽐比赛的兴趣,得打⼼心底喜欢解题,打⽐比赛。不论你做什么事情,都得找到⼀一个值得开⼼心的理由。之于我,我很享受把⼀一道题⺫⽬目ac的愉
悦,以及经过⼤大量思考与尝试解出⼀一道题⺫⽬目的兴奋,如果是在规定时间内那就再愉悦不过了。
效率
• “那么多题⺫⽬目,切哪些呢?”
• “那么多⽐比赛,做哪些呢?”
• ”那么多知识点,掌握哪些呢?”
当你的态度端正之后,你会不可避免地发现你的⼤大部分时间都在切题,做⽐比赛了。这是常态,你的兴趣使你乐此不疲。但你不能盲⺫⽬目地追求题量,追求ac。你永远都得站在⾃自⼰己的⾓角度思考
(不是为了旁⼈人思考)。这时候,你需要的是,正确地,有选择性的切题,做⽐比赛,把时间和精⼒力都⽤用在⼑刀刃上。这⾥里我们称之为效率。!
这⾥里效率⼀一⽅方⾯面在选择,有取舍,另⼀一⽅方⾯面在⾼高效的习惯/⼯工具⽀支持。!
选择来看,⼀一开始我们可能会看到有很多OJ,很多题库,很多⽐比赛,我的想法是: 在个⼈人时间上你的训练得循序渐进,扎实地完成各项基础到进阶的专题训练,找经典的题⺫⽬目反复刷。另⼀一⽅方
⾯面不能错过⽐比赛,即便⽐比赛排得满满的。⼀一个⾯面向⼤大众的⽐比赛,基本能满⾜足各个层次的⼈人的需要。poj monthly / zoj monthly / sgu / ural / uva 等,但凡有⽐比赛就花时间做⼀一下,每次都把符合
⾃自⼰己level的题⺫⽬目切掉,对刚好差⼀一点实⼒力/运⽓气的题⺫⽬目加强⼀一下训练,争取在下⼀一次切掉。好的适合⾃自⼰己的有提⾼高的⽐比赛可遇不可求,⼀一有机会就别错过。另⼀一⽅方⾯面,有⼀一些⼀一年⼀一度的⽐比赛
我⾄至今还在做,确实有趣,也能收获⼀一些⽐比奖⾦金来得更cool 的东⻄西,⽐比如 各⼤大编程⽐比赛的T, ⾯面试机会等,⺫⽬目前我还在做 gcj , hackercup , ipsc , cha24等⽐比赛,有些需要组队参加,这样的机
会⼀一年⼀一次,题⺫⽬目质量很⾼高,趣味性强,做完还可以看完善的题解,帮助很⼤大,所以请尽量提前安排时间参加。另外,平常基本功和实战练习还有两个很好的平台,topcoder 和
codeforces(近来⼜又有⼀一个 hackerrank 也不错)。 topcoder 对刷 1A 率很有帮助,也能让你尽量把代码写简洁,我⾮非常喜欢这个平台,喜欢做上⾯面的 SRM 和 marathon。SRM ⺫⽬目前每⽉月⼤大概四
场(之前仅有两场), ⼀一般是凌晨= = balabala,总之很棒。 cf 的话我以前都随便做做,cf 上的题⺫⽬目感觉看作者,有时很棒,有时⼜又过难,同理,抓住其中有趣的题⺫⽬目死磕,学习,掌握,为⼰己
⽤用。知识点⽅方⾯面,有些基础的东⻄西是学不完的,⽐比如 dp , ⽐比如贪⼼心。dp是越学越喜欢,越学越神奇,建议每个⼈人都应该做做那些经典的有趣的dp题,然后对⽇日后在⽐比赛中遇到的奇形怪状的
dp题也多做总结,dp虽然有⼀一定⽅方法,但很看灵感,也是很有趣的东⻄西。有些特定领域的算法掌握以下,并对基本变形有了解。有些过偏的算法理解⼀一下即可,或者分⼯工,各⾃自攻克。!
习惯/⼯工具⽅方⾯面呢?碎⽚片化时间管理(善⽤用各种碎⽚片时间), 时间效率⼯工具(todo 管理 trello , wunderlist)
总结,分享
• 吾⽇日三省吾⾝身。
• 赠⼈人玫瑰,⼿手有余⾹香。
接下来我打算谈谈总结和分享吧。我觉得⼀一直做,却不总结,不分享的话,那收效必然不好。总结和分享在什么场合,做什么事情下都适⽤用。先说说总结,为什么要做总结呢? 看看⾃自⼰己有没
有进步,⿎鼓励⾃自⼰己?找到⾃自⼰己进步/失利的原因,顺势⽽而为/求变? 关注结果,但我们应该更关注过程,好的可控的过程往往能带来好的结果。⽐比如做了⼀一段的专题训练,把⾃自⼰己的切题感想记
录⼀一下,总结⼀一下常⻅见的题型,变种,编码过程中的常⻅见错误。⽐比如参加了⼀一个在线/现场赛,⾃自⼰己的策略很成功/失败,分析⼀一下原因,花时间写⼀一下⽐比赛总结。⽐比如列⼀一下半/学期⺫⽬目标,定
期总结⼀一下阶段性成果,看看是否有偏差,分析⼀一下偏差的原因以及怎么补救。!
总结是⼀一块,分享也很重要,⼀一般来说,我们总结的⾃自⼰己的东⻄西,往往会按照我们的思考记忆⽅方式存储,有时候也是不⼯工整的,⽋欠考虑的。当我们考虑将我们的想法分享出来,这时伴随的⼯工
作量就不是⼀一个数量级了。我们得思考清楚怎么说明⽩白我们分享的东⻄西,以⼀一种他⼈人能理解的,有条理性的⽅方法阐述。分享的⽅方式有很多种,写⾼高质量的博⽂文,写⼀一个⾼高质量的主题slide。在
我们准备和实际分享的过程当中,我们往往能对⼀一个知识有更深刻的理解。!
当然,同样的,⼯工具还是很重要。 evernote / blog(vim + markdown + github pages)
交友,讨论
• 独学⽽而⽆无友,则孤陋⽽而寡闻。
最后⼀一点,我觉得就是得多⾛走出去,多跟⾥里⾯面/外⾯面的同学切磋经验。⼀一份快乐两个⼈人分享,就会成为两份快乐。切题打⽐比赛是持久战,寻找⼏几个志同道合的战友很关键。不⼀一定要本校的同
学,多和外校的同学交流,多和那些你仰慕的⼈人交流。⼤大⽜牛往往不吝啬回答问题的,你只需要提出邀请。多交友的话这样在打有趣的⽐比赛时就可以⼀一起切磋,对于有趣的题⺫⽬目可以⼀一起讨论,
共享⼀一些相关信息,互相促进互相提⾼高。和⼤大⽜牛交朋友的话能够加速促进⾃自⼰己提⾼高,为了能跟上⼤大家的节奏,你必须努⼒力去掌握新的知识,必须让其他⼈人也可以从你⾝身上获取到⼀一些有⽤用的信
息。那么这些朋友仅仅是在搞竞赛的时候对你有⽤用吗,不仅如此的,你在这时候建⽴立起来的朋友关系,其实就为你⽇日后⼯工作的⼈人脉关系建⽴立打基础了。搞acm的同学或者说it⽅方⾯面的同学⼀一般
都⽐比较nice,助⼈人为乐,不会去算计,今后⼯工作上有需要,⽐比如需要探讨⼯工作上的难题,⽐比如希望帮忙内推其他⼯工作机会,找acm的朋友内推都很靠谱。
谋事在⼈人,成事在天
We are hiring.

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如何做一个好的acmer