brain

tamnd's digital brain — notes, problems, research

41997 notes

Lesson 3: Literary Mandarin

Mastering literary devices, aesthetic vocabulary, and the expressive architecture of Chinese literary prose and poetry.

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精湛 (jīngzhàn) — superb; masterly

HSK 5 | adjective | superb, consummate, highly skilled

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难过 (nánguò) — sad; unhappy; to feel bad

HSK 3 | adjective | feeling emotional pain or sadness

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汉语 (Hànyǔ) — Chinese language (spoken)

HSK 1 | noun | Chinese language, Mandarin Chinese

hsk-1vocabularya1
CF 470D - Caesar Cipher

We are asked to implement a simple Caesar cipher. The input gives us a key k, an integer between 0 and 25, which represents how many positions each letter in the message should be shifted forward in the alphabet.

codeforcescompetitive-programming*special
口语 (kǒuyǔ) — spoken language

HSK 3 | noun | spoken language, as opposed to written language

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毎 — Kanji Reference

毎 (every, each): 6 strokes, JLPT N5. On: マイ. Kun: none.

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模糊 (móhu) — vague / blurry

HSK 4 | adjective / verb | vague, blurry; to blur

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根基 (gēnjī) — foundation, basis

HSK 6 | n | the deep root or foundation upon which something is built or sustained

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相反 (xiāngfǎn) — opposite; contrary; on the contrary

HSK 3 | adjective/adverb | describes opposition or reversal between two things or ideas

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可能 (kěnéng) — possible, maybe

HSK 2 | adjective / adverb | expressing possibility; works both as 'possible' (adjective) and 'maybe' (adverb)

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比较 (bǐjiào) — relatively / to compare

HSK 3 | adverb / verb | comparatively, relatively; to compare two things

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博弈 (bóyì) — game (theory), strategic contest

HSK 5 | noun/verb | a strategic game or contest involving competing interests and decisions

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〜とはいえ — JLPT N1 Grammar

N1 grammar pattern 〜とはいえ: acknowledging a stated fact while introducing a contrasting reality — 'even though, that said, granted that.'

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经验 (jīngyàn) — experience

HSK 3 | noun | experience gained through practice or living, not academic knowledge

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涌现 (yǒngxiàn) — to emerge in large numbers

HSK 5 | verb | to emerge; to spring up; to appear in abundance

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监管 (jiānguǎn) — to regulate; regulation; oversight

HSK 5 | verb/noun | official supervision and control by a regulatory authority

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Lesson 7: Imperfect and Future Tense Active

Form and use the imperfect (ongoing past) and future tenses for all four conjugations and esse.

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通知 (tōngzhī) — notification; to notify

HSK 4 | noun/verb | an official notice or the act of informing someone

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制裁 (zhìcái) — sanction, to sanction

HSK 5 | noun/verb | coercive measures imposed to punish or compel compliance

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观众 (guānzhòng) — audience; spectators

HSK 4 | noun | the audience watching a performance or show

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实例 (shílì) — example; instance; case

HSK 5 | noun | a concrete example or real-world instance used to illustrate a point

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出版 (chūbǎn) — to publish; to issue

HSK 5 | verb / noun | to publish (a book or periodical)

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打扰 (dǎrǎo) — to disturb; to bother; to interrupt

HSK 4 | verb | disrupting someone's activity or peace

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Lesson 2: Directions & Navigation

Learn to give and follow directions in Chinese using left, right, straight, and the 从...到... structure.

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Lesson 7: Time, Days, and Months

Learn to tell the time, name days of the week and months, and use temporal adverbs and the correlative -am series.

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进程 (jìnchéng) — process, progress

HSK 6 | n | the course or advancement of a process, especially a large-scale historical or social development

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古 — Kanji Reference

古 (old): 5 strokes, JLPT N5. On: コ. Kun: ふる-い、ふる-す.

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不过 (búguò) — however

HSK 3 | conjunction | however, but — a softer contrast than 但是, often used in conversation

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Sindarin Sentence Structure

Sindarin sentence structure: VSO order, subordinate clauses, relative clauses, negation, and complex sentence examples.

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〜ましょう — Let's ~; Shall We ~?
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N4 Kanji: 医 (Medicine, Doctor)

JLPT N4 kanji 医 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

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老师 (lǎoshī) — teacher

HSK 1 | noun | teacher, instructor

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JLPT N1 Lesson 10: N1 Capstone — Full Simulation and Strategic Analysis

Full N1 simulation: 300-char reading passage with 5 questions, 20 grammar questions, 10 vocabulary questions, timing strategy for 170 minutes, pass rate analysis, the top 20 patterns that distinguish N1 from N2, and guidance on study beyond N1.

japanesen1lessonjlptcapstonemock testexam strategypost-N1
N4 Kanji: 習 (Learn, Practice)

JLPT N4 kanji 習 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

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上市 (shàngshì) — to go public / to come to market

HSK 5 | verb | to list on stock market; to come onto the market

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想象 (xiǎngxiàng) — to imagine; imagination

HSK 4 | verb / noun | to imagine; imagination

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〜に基づいて — JLPT N2 Grammar

Learn how to use 〜に基づいて (ni motozuite) to express 'based on' when grounding decisions, arguments, or actions in formal sources. Includes structure, nuance, examples, and comparisons.

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Japanese Study Roadmap

Week-by-week Japanese study plan from absolute beginner to JLPT N1: phased milestones, resource recommendations, and time estimates.

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软件 (ruǎnjiàn) — software

HSK 5 | noun | computer software or an application

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HSK 2 Vocabulary (New Words)

HSK 2 vocabulary: ~200 new words added at level 2 (cumulative 498). Comprehensive table with Chinese, pinyin, English, part of speech, and examples.

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突出 (tūchū) — outstanding; to stand out; to emphasize

HSK 5 | adjective/verb | conspicuously noticeable; to highlight or protrude

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弘扬 (hóngyáng) — to promote, to carry forward

HSK 6 | verb | to promote and carry forward something of cultural or moral value

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千 — Kanji Reference

千 (thousand): 3 strokes, JLPT N5. On: セン. Kun: ち.

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醋 (cù) — vinegar / jealousy

HSK 3 | noun | vinegar (condiment); colloquially, jealousy in a romantic context

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〜たい — Want to Do ~
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一 (yī) — one

HSK 1 | number | the digit one; tone changes depending on the tone of the following syllable

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弟弟 (dìdi) — younger brother

HSK 1 | noun | one's younger brother

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经济 (jīngjì) — economy; economics

HSK 4 | noun / adjective | the system of production and consumption, or economical/thrifty

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汇报 (huìbào) — Report, give a report

HSK 5 | verb/noun | to report to a superior; a formal report or briefing

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台风 (táifēng) — typhoon

HSK 5 | noun | typhoon, tropical cyclone

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二 — JLPT N5 Kanji

二 (ni/futa-tsu): two. JLPT N5 kanji.

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评价 (píngjià) — to evaluate; evaluation

HSK 5 | verb / noun | to evaluate; assessment

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CF 479B - Towers

We are given several stacks of unit cubes, each stack having an initial height. In a single move, we can take exactly one cube from the top of one stack and place it on top of another stack.

codeforcescompetitive-programmingbrute-forceconstructive-algorithmsgreedyimplementationsortings
正确 (zhèngquè) — correct

HSK 3 | adjective | correct, right, accurate — conforming to fact or standard

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不好意思 (bù hǎo yìsi) — embarrassed; sorry to trouble you

HSK 3 | adjective/expression | feeling embarrassed, shy, or apologetic; sorry to bother you

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〜ておく — Japanese Grammar

〜ておく: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

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羡慕 (xiànmù) — to envy; to admire

HSK 5 | verb | to envy, to admire, to look up to with longing

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况且 (kuàngqiě) — moreover; besides; furthermore

HSK 4 | conjunction | adding a reinforcing reason or point

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大 — JLPT N5 Kanji

大 (dai/tai/oo-kii): big. JLPT N5 kanji.

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智能手机 (zhìnéng shǒujī) — smartphone

HSK 4 | noun | a mobile phone with advanced computing capabilities

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不但 (búdàn) — not only

HSK 3 | conjunction | not only — the first half of the 不但…而且… pattern

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担心 (dānxīn) — to worry; to be concerned

HSK 2 | verb | to feel anxious or worried about someone or something

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仔细 (zǐxì) — careful; meticulous; attentive

HSK 3 | adjective/adverb | paying close attention to detail

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顺利 (shùnlì) — smooth; without a hitch; successful

HSK 4 | adjective | proceeding without obstacles or difficulties

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短信 (duǎnxìn) — text message

HSK 3 | noun | text message, SMS, short message

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以至于 (yǐzhìyú) — to the extent that; so ... that

HSK 5 | conjunction | to the extent that; so much so that; resulting in

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审视 (shěnshì) — to scrutinize, to examine critically

HSK 6 | verb | to look at carefully and critically; to examine with discernment

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积累 (jīlěi) — to accumulate; to build up

HSK 4 | verb / noun | to gradually accumulate or build up over time

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男 (nán) — male, man

HSK 2 | adjective / noun | male gender; a man or boy

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Introduction to Kanji

Introduction to learning Japanese kanji: the Joyo list, reading types, JLPT distribution, top 50 most common kanji, and choosing a learning method.

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又 (yòu) — again (past), also, both

HSK 2 | adverb | again (past repetition), also, and (linking two qualities)

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了解 (liǎojiě) — to understand; to find out; knowledge

HSK 4 | verb/noun | to have a clear understanding of something through learning or inquiry

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表演 (biǎoyǎn) — to perform / performance

HSK 3 | verb / noun | to perform, to put on a show; a performance, show

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比 (bǐ) — than; to compare

HSK 2 | preposition/verb | comparison marker; A比B + adj structure

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再 (zài) — again (future), then, more

HSK 2 | adverb | again (future repetition), then, one more time

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六 — Kanji Reference

六 (six): 4 strokes, JLPT N5. On: ロク. Kun: む、む-つ、むっ-つ、むい.

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五 (wǔ) — five

HSK 1 | number | the digit five

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参与 (cānyù) — to participate in; participation

HSK 4 | verb/noun | to take part in an activity or event; active involvement

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期待 (qīdài) — to look forward to; to expect

HSK 3 | verb/noun | to eagerly anticipate something

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不得不 (bùdébù) — Have no choice but to / must

HSK 4 | adverb | expressing reluctant necessity

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回答 (huídá) — to answer

HSK 3 | verb / noun | to answer, to reply; an answer, a response

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乐观 (lèguān) — Optimistic

HSK 4 | adjective | having a hopeful, positive outlook

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成果 (chéngguǒ) — achievement; result; fruit of effort

HSK 4 | noun | a positive result obtained through effort

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问责 (wènzé) — to hold accountable; accountability

HSK 5 | verb/noun | the act of holding someone responsible for their actions or failures

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相比之下 (xiāng bǐ zhī xià) — by comparison, in contrast

HSK 4 | phrase | used to introduce a comparison

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阐述 (chǎnshù) — to expound; to elaborate

HSK 5 | verb | to expound; to set forth in detail

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〜と思う — Japanese Grammar

〜と思う: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

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Home Vocabulary — Japanese N1

Essential Japanese vocabulary for rooms, furniture, household items, chores, daily routines. N1 level reference with readings, romaji, and examples.

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〜とあれば — JLPT N1 Grammar

N1 grammar pattern 〜とあれば: expressing strong motivation or justification — 'if it is for ~, given that ~, should it be the case that ~.'

japanesegrammarn1jlpt
JLPT N3 Lesson 6: Expressing Change, Tendency, and Difficulty

Master five N3 patterns for describing change, tendencies, and degrees of difficulty: 〜ようになる, 〜ようにする, 〜がちだ, 〜やすい/〜にくい, and 〜得る/〜得ない.

japanesen3lessonjlptgrammarchangetendency
证明 (zhèngmíng) — to prove; proof; certificate

HSK 5 | verb / noun | to demonstrate the truth of something; a document proving a fact

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问题 (wèntí) — problem; question; issue

HSK 4 | noun | something that requires thought, attention, or resolution

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来自 (láizì) — to come from; to be from

HSK 3 | verb | indicating the origin or source of something

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Lesson 14: Chinese Business Etiquette

Master the vocabulary and formal register of Chinese business culture, including negotiation, formal reception, and professional social interaction.

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DCC Core Vocabulary Band 2 (Words 201–500)

Words 201–500 from the DCC Latin Core list — the next 300 most frequent Latin words after Band 1. Complete before moving to Band 3.

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不 (bù / bú) — not, no (negation)

HSK 1 | adverb | negates verbs and adjectives for present, future, or habitual

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社交媒体 (shèjiāo méitǐ) — social media

HSK 4 | noun | digital platforms for social interaction and content sharing

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格外 (géwài) — especially; particularly; unusually

HSK 3 | adverb | indicates a quality exceeds the normal or expected level

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JLPT N4 Lesson 5: Reported Speech and Quoting

Master Japanese reported speech patterns — 〜と言う, 〜と思う, 〜と聞く, 〜によると, 〜そうだ — and learn to convert direct speech to indirect speech with correct plain-form usage before と.

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