英国CS申请 编程项目 竞赛 个人陈述 TMUA
每年十月，申请英国计算机专业的学生会同时面对三件事：一份被拆成三问的个人陈述、一个必须提前报名的数学考试、以及一个「我到底做过什么」的问题。这篇把 2027 入学这一轮的官方口径整理在一起，也给出一条从写代码到写材料的路径。文中日期与分数来自 UCAS、剑桥与牛津官网，以及 BIO 与 Bebras 的赛事页面。下一轮申请整体顺延一年，节奏不变。
Every October, applicants for computer science in the UK face three things at once: a personal statement split into three questions, a mathematics test that has to be booked in advance, and the question of what they have actually built. This piece collects the official requirements for 2027 entry and sets out a route from writing code to writing about it. Dates and figures come from the UCAS, Cambridge and Oxford websites and from the BIO and Bebras competition pages.
UCAS 个人陈述的三问结构
UCAS 从 2026 入学这一轮起把个人陈述拆成三个问题：为什么想学这个专业、你的课程与成绩怎样为此做准备、课堂之外你做了什么以及这些经历为什么有用。三问共用 4000 个字符（含空格），写多少给哪一问由自己分配。对计算机申请来说，第二问和第三问最容易写空，因为它们要的是证据而不是态度。把「我从小喜欢电脑」换成「我在课程设计作业里用 Python 写了一个排课冲突检查器，处理了 120 条课程记录」，招生官读到的东西完全不同。三问不必平均分配，项目与竞赛一般落在第三问；如果项目直接支撑你选这个专业，第二问里提一句课程内容与项目的连接会更自然。
Since 2026 entry, UCAS splits the personal statement into three questions: why the course, how your studies have prepared you, and what you have done outside the classroom, with all three answers sharing a 4,000-character limit including spaces. Most computer science applicants write the first answer well and then flatten the other two into adjectives, while tutors read for evidence of what you built, what broke and what you changed. One concrete sentence about a timetable clash checker tells them more than a paragraph about passion; the same project can sit in question two if it grew out of coursework.
项目要能被别人跑起来
项目的第一条标准是别人能跑起来，而不是你手里有一张截图。仓库里放上可执行的代码、一份写明语言版本与依赖的 README、一个能复现结果的输入样例，这三样东西让面试官可以自己验证。很多学生以为项目越大越好，于是做一个「AI 学习平台」，实际交付的是登录页和几张设计图。一个两百行、能正确处理空输入与重复记录的小工具，比一个跑不起来的宏大系统更有说服力。选题时优先选自己每周都会遇到的场景：课程表冲突、成绩加权计算、错题按知识点归类。这类题目小，但边界清楚，讲得完。
Examiners and interviewers judge a project by whether it runs on another machine, so put the code in a repository, write a README that states the language version and dependencies, and include one input file that reproduces your result. A login page with three mock screens says nothing about how you think, whereas a two-hundred-line tool that handles empty input and duplicate records shows the parts of programming that are hard to fake. Choose a problem you meet weekly, such as a timetable clash or a weighted grade calculation: small scope, clear boundaries, and short enough to explain in two minutes.
版本记录与单元测试的写法
版本记录在面试里是很好用的话题，因为它能说明你是怎么改错的。每次提交写成一句能读懂的话，比如「修正空输入导致的除零」，比十个 update 有用得多；分支与合并冲突的处理过程也能证明你遇到过真实问题。单元测试不必追求覆盖率，挑三到五个关键函数，覆盖正常输入、空输入与极端值就够了。常见的错误是把测试写成打印语句，然后用眼睛判断输出对不对，这种测试换一台机器往往立刻失效。写一个 assert，让程序自己报告结果，被问到测试时你就有具体的东西可讲。
Commit messages are a surprisingly strong interview topic because they show how you debug; a line such as fixing division by zero on empty input is worth ten commits labelled update, and branch or merge-conflict handling proves you met a real problem. Tests do not need full coverage: three to five functions with normal, empty and extreme inputs are enough, and the common mistake is to print values and judge them by eye, which stops working the moment someone else runs the code. Replace the print with an assertion so the program reports its own result, and you will have something specific to say when the interviewer asks about testing.
BIO 三阶段与校内三小时初赛
英国信息学奥赛 BIO 从 1995 年办到现在，分三个阶段。第一阶段是每年 12 月到 1 月在学校里进行的三小时初赛，用一台电脑、纸和笔解几道算法题；第二阶段是复活节期间在剑桥举行的决赛；决赛前四名组成代表队参加国际信息学奥赛，2026 年的 IOI 在乌兹别克斯坦举办。BIO 的题目是竞赛编程风格：给定输入输出格式与时间限制，要求程序跑完，所以训练方式和平时做项目完全不同。官网提供历年真题，从旧题开始做最省时间，先保证能读懂输入输出约束，再考虑优化。BIO 也负责选拔欧洲女子信息学奥赛与西欧信息学奥赛的英国队。
The British Informatics Olympiad has run since 1995 and has three stages: round one is a three-hour paper sat in school between December and January using a computer, pen and paper, and the final takes place in Cambridge at Easter, where the top four students form the team for the International Olympiad in Informatics, hosted by Uzbekistan in 2026. The same competition selects the British teams for the European Girls Olympiad and the Western European Olympiad; BIO problems are contest-style, with an input and output format plus a time limit, which is a different skill from building an app. Past papers on the official BIO site are the cheapest preparation, and the first task is reading the constraints correctly.
Bebras 十一月窗口的四十五分钟
Bebras 的门槛比 BIO 低很多，时间窗口却很紧。2026 年的英国 Bebras 挑战在 11 月 9 日到 20 日之间进行，由 Raspberry Pi Foundation 主办，面向 6 到 19 岁，免费，学校在两周里自选一节课，学生用 45 分钟在线做题，全程不写代码，考的是抽象、分解与算法思维。它的后续赛事是 Raspberry Pi Foundation Coding Challenge，原名牛津大学计算机挑战赛，3 月举行，只有参加过当年 Bebras 的学生才能进入。想在材料里写一项竞赛，Bebras 最容易落地，它不需要长期集训，代价是必须在 11 月之前让学校完成注册。
Bebras is a lower bar than BIO, but the window is narrow. The 2026 UK challenge runs from 9 to 20 November, organised by the Raspberry Pi Foundation, free and open to ages 6 to 19. A school picks one 45-minute lesson inside that fortnight, and students solve interactive tasks online without writing code. Only Bebras participants can enter the follow-on Raspberry Pi Foundation Coding Challenge in March, formerly the Oxford University Computing Challenge. It is the easiest competition to put on an application because it needs no training camp, and the only real requirement is that the school registers before November.
日常写码怎么变成可核对证据
不进国家队的人也需要证据，证据不一定来自比赛。Project Euler 的题号、Advent of Code 的年份与完成天数、给开源项目提交并被合并的 pull request 编号，都是可以被核对的痕迹。写进材料时要带上量与结果，例如「2026 年 Advent of Code 完成前 18 天，第 12 天用记忆化把运行时间从 40 秒降到 0.3 秒」。这一步最容易犯的错是只写平台名，不写自己做了什么，读者无法判断难度。题目与项目覆盖的能力不同：题目有标准答案，项目有你定义的需求，两样都写才完整。
You do not need a national team place to have evidence: Project Euler problem numbers, the year and days you finished in Advent of Code, and a merged pull request number are all checkable traces. Write them with a quantity and a result, such as eighteen days of Advent of Code in 2026 with day twelve cut from forty seconds to 0.3 seconds using memoisation, because naming the platform without saying what you did gives a reader nothing to judge. Puzzles show you can solve defined problems, projects show you can define one, and the two together cover different ground.
TMUA 两卷四十道选择题
剑桥与牛津的计算机专业现在都看 TMUA。剑桥官网写明 2027 入学的计算机申请者必须参加 TMUA，报名从 2026 年 7 月 20 日开始，9 月 28 日截止，考试在 10 月 12 日到 16 日，中国大陆、香港与澳门的考生固定在 10 月 15 日或 16 日，11 月 16 日出分；申请 Peterhouse 或 Trinity 的还要加考 CSAT。牛津在 MAT 于 2025 年 10 月最后一次开考后改用 TMUA，并且只接受 10 月场次。试卷共两卷，每卷 75 分钟 20 道选择题，合计 40 题，成绩按 1.0 到 9.0 报告，答错不倒扣，不许带计算器与词典，第二卷考数学推理与逻辑证明。备考材料上，旧 MAT 的选择题与第一卷重合度高，第二卷的逻辑与证明要按 UAT-UK 发布的 Notes on Logic and Proof 补。成绩没有及格线，剑桥与牛津都把它放进整体材料里一起看。
Cambridge and Oxford both use the TMUA for computer science now: Cambridge states that 2027 entry applicants must sit it, with booking from 20 July to 28 September 2026, the test between 12 and 16 October and results on 16 November, and candidates in mainland China, Hong Kong and Macau sit on 15 or 16 October. Peterhouse and Trinity applicants also take the CSAT, while Oxford retired the MAT after its final sitting in October 2025 and accepts the October TMUA only. The paper is forty multiple-choice questions across two 75-minute sections, reported on a 1.0 to 9.0 scale, with no negative marking and no calculator.
剑桥牛津的选科与分数口径
剑桥官网给出的 2027 入学计算机门槛是 A-Level A*A*A，IB 41 到 42 分且高阶科目 776，并且要求数学；学校若开设进阶数学到 AS 或 A-Level，就必须选。IB 学生被要求选择分析与方法 AA。同一页还写明 2025 申请季每个名额约 14 人竞争，最终录取 128 人，这组数字比任何「录取率」说法都具体。选科上真正拉开差距的是数学深度：进阶数学里的矩阵、复数与证明，直接对应 TMUA 第二卷与大一课程。很多学生以为计算机申请要多堆编程语言，海外院校看的其实是数学能力加上一个讲得清楚的项目。
Cambridge lists A*A*A at A-Level, or 41 to 42 points at IB with 776 at Higher Level, for 2027 entry, and Mathematics is required, with Further Mathematics taken if the school offers it and Analysis and Approaches for IB applicants. The same page reports about fourteen applications per place in the 2025 cycle and 128 acceptances, which is more useful than a quoted acceptance rate. Depth in mathematics matters more than the number of languages on your list: matrices, complex numbers and proof in Further Mathematics map onto TMUA Paper 2 and the first-year course.
六月到十一月的报名时间线
把日期摊开看，2027 入学这一轮的节奏是：2026 年 6 月 1 日 UAT-UK 开放账户与助学金申请，7 月 20 日开放报名，9 月 14 日特殊考试安排申请截止，9 月 28 日报名截止，10 月 12 日到 16 日考试，10 月 15 日 UCAS 申请截止，11 月 16 日出分。9 月 28 日最容易被漏掉，它落在开学后的第三周，而考试报名与 UCAS 提交是两套系统。错过报名没有补考，牛津也只认 10 月场次，日历上要往前挪一个月开始准备。英国考生还可以申请助学金券，从 2026 年 6 月 1 日起开放，能免掉考试费。需要加时或特殊安排的考生要在 9 月 14 日之前提交申请，比报名截止早两周。项目与竞赛的痕迹最好在 9 月之前就整理完，十月的注意力应该留给试卷。
The 2027 entry cycle reads as a sequence of dates: UAT-UK accounts and bursary applications from 1 June 2026, booking from 20 July, access arrangements closing 14 September, booking closing 28 September, tests from 12 to 16 October, the UCAS deadline on 15 October, and results on 16 November. The 28 September booking deadline is the one people miss, because it falls in the third week of term and sits in a different system from the UCAS form. There is no late sitting and Oxford accepts October only, so finish sorting your project and competition evidence before September and leave October to the paper.
面试追问项目细节的两种问法
计算机面试很少问「会不会 Python」，更常问「这个项目为什么这样设计」。典型的两类追问是：你的数据用的是什么结构，换成另一种会怎样；如果输入规模从一千变成一百万，哪一步会先变慢。回答的前提是你真的写过代码，并且记得当时的取舍。准备时把自己的仓库重读一遍，找出三个可能被追问的决策点，各准备一句理由。面试官也会给一道现场小题，通常不需要写完整程序，说清思路与边界条件就够。
Interviews rarely ask whether you know Python; they ask why the project was designed that way, and two predictable follow-ups are what data structure you used and what would change with a different one, plus which step slows down first when the input grows from a thousand records to a million. You can only answer those if you wrote the code and remember the trade-off, so reread your own repository beforehand and pick three decisions worth defending. The live problem is usually small, and explaining the approach and edge cases matters more than finishing the program.
三类经不起追问的材料
招生官读材料时最常停在两处：一句没有任何细节的自我评价，与一段语气过于成熟的英文。包装过度的项目、买来的竞赛证书、别人改过的个人陈述，在追问下都会露出破绽，因为细节无法即兴编造。常见的错误是花两个月润色语言，却只花两天写代码，结果第三问里没有任何可核对的成果。稳一点的做法是先做一件小事并留下痕迹，再决定用哪一句话去描述它。顺序反过来，材料就会比人跑得快。
Two things stop a reader: a self-assessment with no detail, and English far more polished than the rest of the file. Over-packaged projects, purchased certificates and heavily rewritten statements all collapse under one follow-up question, because detail cannot be improvised, and two months on wording with two days on code leaves the third question empty. Build something small, keep the trace, then decide which sentence describes it; in that order the material stays behind the person, which is where it should be.
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