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HSK 5 | n/v | a symbol or symbolic representation; the act of symbolizing

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

Books for learning Sindarin: grammar references, textbooks, and the primary source journals Vinyar Tengwar and Parma Eldalamberon.

HSK 4 | adjective | not in accordance with reason or logic

HSK 6 | n | the form, configuration, or mode of existence of something; morphology

HSK 4 | verb/noun | the act of choosing or a choice made

Decode formal newspaper Japanese at N3 level: headline omission rules, passive constructions, nominalization, 〜により/〜として in formal writing, number expressions, and analysis of real-style article sentences.

Master the paired connectives 虽然...但是, 因为...所以, and 尽管...还是 to express contrast and cause-effect relationships in complex sentences.

HSK 4 | noun | a superior position or quality that gives an edge over others

HSK 5 | verb | to present; to emerge; to take on a certain appearance

HSK 5 | verb/noun | to criticize systematically; critique; critical analysis

HSK 4 | verb/noun | to strive against others for the same goal or resource

HSK 5 | verb | to drive forward; to promote; to give impetus to

Sindarin collective suffixes: -ath (total collective), -rim (people/kindred), -hoth (hostile host), -gwaith (company) — with all attested examples from Tolkien.

HSK 4 | noun | a positive result obtained through effort

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

一 (ichi/itsu/hito-tsu): one. JLPT N5 kanji.

The problem defines a linear sequence $fn$ with two initial values $x = f1$ and $y = f2$, and a recurrence that repeats every six terms: $f{n} = f{n-1} - f{n-2}$.

Esperanto vocabulary for school, university, subjects, learning, and academic life.

HSK 3 | verb | to obtain or achieve something through effort

HSK 5 | verb/noun/adjective | to put in effort or resources; input; deeply absorbed

HSK 1 | greeting phrase | reassures someone after an apology

HSK 3 | preposition / verb | toward, in the direction of; facing; to face

七 (shichi/nana-tsu): seven. JLPT N5 kanji.

HSK 1 | noun | airplane, aircraft

HSK 2 | phrase | standard response to thanks; also means 'don't be polite'

HSK 5 | verb | to become involved in a situation in order to influence its outcome

HSK 1 | particle | marks possession, noun modification, and nominalization

HSK 1 | measure word | classifier for long, narrow, or flexible objects

HSK 3 | verb | to accept, to receive, to take in willingly

HSK 4 | verb/noun | to commit money or resources in expectation of future returns

HSK 4 | verb | to transfer data from the internet to a device

HSK 3 | noun | the function, role, or effect that something produces

HSK 6 | n | a guiding idea, philosophical concept, or core belief underlying a practice or system

Sindarin words for emotions, philosophical concepts, and states of being — including the key philosophical terms estel, amarth, and gûr that Tolkien embedded in his Elvish worldview.

HSK 5 | verb | to talk someone into something; to win someone over

HSK 4 | noun | opportunity; favorable chance

HSK 3 | verb | to raise something upward or to give an example

HSK 4 | adjective/noun | relating to a specific field of expertise

HSK 1 | verb / preposition | means to give or indicates the recipient of an action

HSK 1 | noun | name, given name

Master the art of indirect communication by learning how to express complex limitations, obligations, and partial negations in professional Japanese.

海 (kai/umi): sea. JLPT N5 kanji.

HSK 3 | noun | a particular side or dimension of a topic or issue

HSK 4 | noun | doctor, physician

HSK 3 | verb | to push, to shove, to promote or recommend

空 (sky, empty): 8 strokes, JLPT N5. On: クウ. Kun: そら、あ-く、から.

The complete sound change history from Primitive Elvish through Common Telerin and Old Sindarin to Classical Sindarin — explaining WHY mutations exist and how the vowel system developed.

HSK 3 | adjective/adverb | arriving or happening at the scheduled time

HSK 5 | noun | an overflow of water onto normally dry land; a flood

HSK 5 | noun / adjective | the activity of governance; relating to political affairs

We start with a string s. We may delete exactly x characters, keeping the remaining characters in their original order. The resulting string is a subsequence of s. Inside that resulting string, we look for as many non-overlapping occurrences of a pattern p as possible.

Discuss urban living, infrastructure, and city development using 在 + city + 生活/工作 and city vocabulary at B1 level.

A dinner is represented as a sequence of flowers. A red flower contributes length 1, while white flowers are special: they may only appear in contiguous groups of exactly k flowers.

HSK 1 | pronoun | third-person singular pronoun for non-human things

HSK 4 | noun | science and technology as a combined field

Learn 〜こそ and 〜だからこそ to place emphatic focus on a specific element — 'it is precisely X' and 'precisely because of X.'

HSK 3 | conjunction | although, even though — introduces a concession, paired with 但是 or 还是

HSK 3 | verb | to manage, to be in charge of; to bother with, to concern oneself with

N1 grammar pattern 〜にほかならない: emphatic definitional assertion — X is nothing other than Y. Used for declarative identification, formal analysis, and rhetorical emphasis.

Engage with Chinese discourse on the ethical dimensions of technology, including AI ethics, privacy, data security, and algorithmic bias.

HSK 4 | n/v | the state of not succeeding; to not succeed

HSK 1 | adverb | strong intensifier meaning extremely or exceptionally

HSK 5 | verb | to trace back to a cause; to attribute; to come down to

HSK 5 | verb/noun | to communicate; mutual exchange of information or feelings

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

HSK 5 | verb | to stir emotionally; to touch on a sensitive point

HSK 3 | adjective | feeling emotional pain or sadness

HSK 4 | verb | to have capacity for a number of people or things

HSK 5 | noun/adjective | spirit, mind, essence; energetic, lively

The task is to compute the Hamming distance between two strings of equal length. In practical terms, you are comparing two sequences of letters and counting how many positions contain different characters. Each mismatch contributes exactly one to the distance.

We are given a set of n distinct integers. Every number must be assigned to one of two groups. If a number x is placed into group A, then its complement with respect to a, namely a - x, must also be present and must belong to A.

HSK 2 | adjective | describes something of great significance or necessity

複雑な (ふくざつな / fukuzatsu na): complicated. N4 level Japanese vocabulary.

HSK 3 | pronoun / adjective | referring to remaining or different items

HSK 5 | adjective | on the brink of danger or extinction; endangered

HSK 2 | measure word / adjective | counts items that come in pairs

HSK 2 | noun | a question to ask, a problem to solve

HSK 5 | adjective | complex, complicated, intricate

HSK 1 | adverb | negates past actions and the verb 有

HSK 4 | noun | an official document certifying achievement or qualification

HSK 4 | noun | a legally binding written agreement between parties

We have a game with levels numbered from 1 to n. Little X can complete some subset of these levels, and Little Y can complete another subset. They decide to cooperate, which means a level is considered passable if at least one of them can complete it.

HSK 1 | noun | noodles

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

HSK 3 | verb / noun | to explain, to interpret, to clarify; an explanation

HSK 3 | verb | to convey thoughts or feelings

HSK 5 | verb/noun | conversion or transformation between forms/states

HSK 3 | noun | police officer, policeman, the police

We are given the beauty values of n flowers. We must choose exactly two flowers. Among all possible pairs, we are interested only in pairs whose beauty difference is as large as possible.

Sindarin possessive pronouns: suffix forms attached to nouns, independent possessive forms, and the genitive construction with en.

We are given an undirected weighted graph representing cities and roads. City 1 is the capital. In addition to normal roads, there are special train routes that connect the capital directly to some city. The government wants to close as many train routes as possible.

HSK 3 | noun | reason, cause — what explains why something happened

Learn 〜たところ to express the discovery of an unexpected result upon completing an action, used in formal reports and investigations.

HSK 3 | verb | to move upward or forward by springing off the ground

N1 grammar pattern 〜ずにはすまない: expressing that social norms, morality, or the situation demands that X be done — one cannot get by without doing X.

HSK 1 | noun | company, corporation, firm

HSK 4 | verb/noun | to train, to provide training; training

家 (house, family): 10 strokes, JLPT N5. On: カ、ケ. Kun: いえ、や.

HSK 5 | verb/noun | to propose a course of action; a proposal or recommendation