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HSK 3 | interjection / verb | a cheer of encouragement, or to add fuel/gasoline

HSK 5 | verb | to check and confirm the accuracy or truth of information

We have an array of integers, each between 1 and n, and we need to support two types of operations efficiently. The first operation rotates a segment of the array one step to the right. The second operation counts how many times a particular value occurs in a segment.

HSK 4 | adjective | rude, impolite, rough in manner

HSK 2 | noun | a hat or cap worn on the head

HSK 3 | noun | class, classroom group; work shift; scheduled service

HSK 5 | verb/noun | development of diversity and variety in forms or approaches

A comprehensive review of all A1 grammar, 100 essential vocabulary words, key survival phrases, and guidance on the path to A2.

HSK 5 | noun | a subject or theme being talked about

変える (かえる / kaeru): to change. N4 level Japanese vocabulary.

HSK 1 | noun | one's younger brother

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

HSK 3 | noun | a public outdoor space for recreation and leisure

HSK 1 | greeting phrase | expresses gratitude

HSK 3 | noun | vegetables, the specific category of edible plants

HSK 5 | noun/adjective | reason; rational thinking; based on logic rather than emotion

Complete guide to Sindarin soft mutation: all 11 initial consonant changes, every trigger category, and 30+ worked examples from Tolkien's texts.

HSK 3 | noun/verb | an activity, event, or to move around

長 (chou/naga-i): long. JLPT N5 kanji.

読 (read): 14 strokes, JLPT N5. On: ドク、トク、トウ. Kun: よ-む.

HSK 1 | noun | the early part of the day, from dawn to around 9 a.m.

HSK 4 | verb/noun | physical exercise or training to improve health

Guidelines for composing grammatically correct Neo-Sindarin: the scholar's toolkit, morphotactic constraints, how to coin new words, and how to evaluate others' Neo-Sindarin.

HSK 4 | grammar pattern | expressing a logical conclusion based on an accepted premise

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

HSK 5 | noun | a disorder of structure or function in a living organism

HSK 3 | noun/adjective/adverb | the natural world; being natural or obvious

HSK 4 | verb/noun | granting official permission or power to someone

HSK 5 | verb / noun | to plan and create; a plan or design

HSK 4 | verb/noun | to work together toward a shared goal

Learn to describe your daily routine using V + 了 for completed actions and sequence time words.

HSK 4 | adjective / verb | lively, active, or to make something more vibrant

HSK 4 | noun | designer; architect

N1 grammar pattern 〜とあって: because of the special circumstance of X, the situation/behavior Y naturally follows. Literary and formal register.

HSK 5 | noun | sovereignty; sovereign rights

The task revolves around finding two integers, l and r, such that the sum of all digits from l to r modulo a given number a produces an edge case for a buggy implementation. The function f(x) denotes the sum of the decimal digits of x.

There are $m$ complete decks, each containing the same $n$ card values. After mixing all decks together, there are $mn$ physical cards in total, and every value appears exactly $m$ times.

HSK 2 | adjective | describes an absence of noise or disturbance

HSK 4 | noun/adjective | the record of past events or something relating to the past

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

HSK 5 | verb | to recruit; to enlist members, volunteers, or employees

Complete guide to spaced repetition for Mandarin Chinese: Anki setup, optimal settings, what to put in SRS, Pleco integration, Skritter, and daily habit tips.

話 (talk, story): 13 strokes, JLPT N5. On: ワ. Kun: はな-す、はなし.

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

HSK 3 | noun | a goal, target, or objective to aim for

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

HSK 4 | noun | edible plant parts such as leaves, roots, and stems

聞 (hear, ask): 14 strokes, JLPT N5. On: ブン、モン. Kun: き-く、き-こえる.

HSK 3 | noun | nurse — medical professional who cares for patients

Learn 〜ざるを得ない to express unavoidable obligation — you have no choice but to do something, despite reluctance.

聞 (bun/mon/ki-ku): hear. JLPT N5 kanji.

HSK 1 | adverb | indicates earliness, immediacy, or that something happens sooner than expected

HSK 4 | verb/noun | to establish with certainty that something is true or agreed upon

Master the full correlative system with accusative, plural, stacked, and free-choice forms, plus result clauses and temporal subordinators.

HSK 3 | noun | condition, requirement, terms, prerequisite

Learn how to use 〜をはじめ (wo hajime) to express 'starting with' or 'including' when listing a representative example of a broader group. Includes structure, nuance, examples, and comparisons.

Engage with the major authors, works, and critical debates that constitute the Esperanto literary tradition from Zamenhof to the present day.

HSK 5 | noun | an economic, practical, or personal need or demand for something

HSK 3 | verb | to mistakenly believe something to be true

HSK 5 | verb | to investigate deeply; to explore and inquire into the nature of something

HSK 4 | n | money collected by the government through taxes

HSK 5 | verb | deliberate increase in scope, scale, or size

HSK 5 | adjective | complex, complicated, intricate

続ける (つづける / tsuzukeru): to continue. N4 level Japanese vocabulary.

HSK 6 | verb | to sum up the essential points; to state in broad terms

HSK 4 | noun | knowledge, learning

A review lesson integrating all novice grammar in context: sentence-by-sentence analysis of two Latin passages, a curriculum summary, and independent reading practice.

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

HSK 3 | preposition | expressing purpose or goal

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

HSK 6 | verb | to deliberately construct or build up a system, framework, or concept

HSK 5 | verb/noun | the state of being unable to repay debts; financial insolvency

HSK 2 | pronoun | reflexive pronoun referring back to the subject

The 200 most frequent Latin words from the Dickinson College Commentaries core list. Learn all 200 before moving to Band 2.

HSK 4 | verb | to refer to something briefly in speech or writing

決める (きめる / kimeru): to decide. N4 level Japanese vocabulary.

How long it takes to learn Esperanto — time estimates per CEFR level and comparison with other languages.

肉 (ニク): meat; flesh. JLPT N5 essential kanji.

HSK 1 | noun | airplane, aircraft

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

HSK 3 | adjective/noun | able to wait calmly without frustration

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

HSK 3 | verb | to solve, resolve, or settle a problem or difficulty

Full tables for personal, reflexive, and demonstrative pronouns; the cum enclitic; and the absence of a true 3rd-person personal pronoun.

HSK 3 | adjective | calm and free from noise

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

HSK 5 | noun/verb | to test or examine; a test or trial

HSK 5 | adjective/noun | emotional; driven by feeling; perceptual (as opposed to rational)

Japanese travel vocabulary: transportation, accommodation, directions, airports, stations, and essential travel phrases.

HSK 4 | verb/noun | to provide explanation or commentary

校 (school): 10 strokes, JLPT N5. On: コウ. Kun: none.

HSK 5 | noun / adjective | diplomacy, foreign affairs; diplomatic

HSK 5 | noun | large-scale digital data sets and their analysis

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

HSK 3 | noun | map — a visual representation of an area used for navigation

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.

HSK 5 | verb / noun | to anticipate something with hope; hopeful expectation

Master Japanese passive (〜られる/〜れる), causative (〜させる/〜せる), and causative-passive (〜させられる) forms. Includes full conjugation tables for 10 verbs, the suffering passive, and three dialogues contrasting active/passive/causative perspectives.

HSK 4 | noun | an aim or destination one works toward

HSK 3 | adverb/adjective | happening without warning