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Channel

Библиотека собеса по C++ | вопросы с собеседований

@cpp_interview_lib

On this record: Topic · Growth · Engagement · Reactions · Posts · Polls · Citations · Telegram's recommendations · Cite this entry

4,608subscribers

-5 since we began measuring on 6 August 2026

Risers and fallers across the register · movement among entries of 3,162–10,000.

Register entry

Telegram ID-1001770516712
TypeChannel
Username@cpp_interview_lib
Created3 August 2023 — measured — cross-checked against a third-party dataset (ext.tg_channel)
First recorded6 August 2026
Last confirmed live18 September 2026
Measurements held13
Confirmed unchanged1 time, most recently 18 September 2026
On Telegramt.me/cpp_interview_lib

Topic

Education — a classification, not a measurement. An on-box language model (Qwen3.6-35B-A3B-FP8, prompt version 1) read this channel’s own recent posts on 13 September 2026 and assigned it the closest of 31 fixed categories, at 98% confidence. This is a model’s judgement about what the channel is likely to be about, not a fact this register measured the way a subscriber count or a view count is measured — it can be revised on a later pass, and it carries no weight anywhere else on this page. How this classification works, and why it has no browse page of its own yet.

Growth

4,5964,6134,604.56 August 2026 — 4,613 subscribers6 August 2026 — 4,611 subscribers10 August 2026 — 4,606 subscribers12 August 2026 — 4,605 subscribers15 August 2026 — 4,604 subscribers19 August 2026 — 4,606 subscribers22 August 2026 — 4,602 subscribers25 August 2026 — 4,597 subscribers31 August 2026 — 4,596 subscribers4 September 2026 — 4,600 subscribers10 September 2026 — 4,602 subscribers14 September 2026 — 4,604 subscribers18 September 2026 — 4,608 subscribers4,6086 August 202618 September 2026
13 measurements spanning 43 days, net -5. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 4,593–4,616 and does not start at zero.
Measurement log — every subscribers count we have recorded
Measured (UTC)SubscribersChange
18 Sept 2026, 06:574,608+4
14 Sept 2026, 07:374,604+2
10 Sept 2026, 07:594,602+2
4 Sept 2026, 16:394,600+4
31 Aug 2026, 22:144,596-1
25 Aug 2026, 07:564,597-5
22 Aug 2026, 08:074,602-4
19 Aug 2026, 02:224,606+2
15 Aug 2026, 19:444,604-1
12 Aug 2026, 20:034,605-1
10 Aug 2026, 04:144,606-5
6 Aug 2026, 23:444,611-2
6 Aug 2026, 05:334,613first reading

Engagement

20 posts held, back to 16 July 2026 — the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 7 pages of Telegram’s post history, 20 posts per page.

Nothing published in the last 30 days. ERR and ER are rolling 30-day measures, so there is nothing to compute — we hold 20 posts for this entry, the most recent from 5 August 2026. An engagement rate over an empty window would be a number about nothing.

Reaction mix

7 reactions across 3 posts, in 3 distinct kinds. The most used accounts for 42.9% of them.

Every reaction kind recorded on the sample, most used first
ReactionCountShareShare, drawn
🤔342.9%
👾228.6%
😁228.6%

No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.

Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.

Coverage. Reactions were read on 4 of the 20 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 7 reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.

Measured over the 20 most recent posts we hold, published 16 July 2026 to 5 August 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.

Recent posts

5 Aug 2026, 14:04 UTC399 viewsread 12 August 2026
Poll

Какая сложность у std::map::insert?

  1. O(1)22%
  2. O(n)7%
  3. O(log n)64%
  4. O(n log n)7%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

5 Aug 2026, 13:20 UTC385 viewsread 12 August 2026

Покупать новый курс каждый раз, когда меняется рабочая задача, — довольно странная механика. Нашли альтернативу 👇

5 Aug 2026, 13:20 UTC251 viewsread 12 August 2026
Forwarded from @proglib_academyPhoto

👅 Самое сложное — выбрать не курс, а направление Сегодня хочется разобраться в AI-агентах. Через пару недель появляется задача, где нужны алгоритмы. Потом понимаешь, что неплохо бы освежить Python или математику для Data Science. 🔜 Именно поэтому подписка на обучение многим оказывается удобнее отдельных курсов. Можно спокойно переключаться между темами, когда меняются задачи, а не покупать новую программу каждый ра…

4 Aug 2026, 08:31 UTC415 viewsread 12 August 2026
Poll

Какая ошибка возникнет при попытке использовать std::ranges::to для конвертации range в контейнер, не поддерживающий требуемый интерфейс?

  1. Ошибка компиляции77%
  2. Ошибка линковки3%
  3. Runtime ошибка12%
  4. Молчаливое создание пустого контейнера4%
  5. Использование альтернативного метода конструкции4%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

31 Jul 2026, 15:08 UTC499 viewsread 12 August 2026
Forwarded from @proglib_academyPhoto

🎯 У разработчика, DevOps-инженера и техлида разные причины задуматься о системной работе с AI-агентами Но цель одна: перейти от случайных удачных запусков к управляемому процессу на реальном проекте — с понятными правилами, ревью, контролем расходов и безопасности ✔️ На курсе «ИИ для разработчиков» участники выстраивают такой процесс на практике: подключают инструменты, задают границы для агента и учатся понимать,…

31 Jul 2026, 15:08 UTC484 viewsread 12 August 2026

Разработчик, DevOps-инженер или техлид — у каждого своя причина навести порядок в работе с AI-агентами. Разбираем, чем отличаются их задачи 😊

31 Jul 2026, 07:04 UTC546 viewsread 12 August 2026
Poll

Где по умолчанию размещается кадр (frame) корутины?

  1. Всегда строго на стеке вызывающего потока38%
  2. В специальном сегменте только для корутин11%
  3. В регистрах процессора для скорости доступа3%
  4. Обычно в куче, но аллокация может быть устранена40%
  5. В статической памяти на всё время программы7%

Shares as published, totalling 99%. No per-option vote count is published by Telegram, so none is shown.

30 Jul 2026, 07:03 UTC519 viewsread 12 August 2026
Poll

Что делает ключевое слово co_await?

  1. Завершает корутину и возвращает финальный результат12%
  2. Приостанавливает корутину до готовности awaitable65%
  3. Создаёт новую корутину внутри текущей функции8%
  4. Блокирует поток до завершения дочерней задачи12%
  5. Возвращает очередное значение генератора наружу4%

Shares as published, totalling 101%. No per-option vote count is published by Telegram, so none is shown.

28 Jul 2026, 08:43 UTC387 views1 reactionsread 12 August 2026
Forwarded from @proglib_academyPhoto

У вас в проекте есть файл вроде utils_v2_final_FIX.py, который все боятся трогать ❓ Что делаете с таким легаси? ❤️ Не трогаю: работает — и ладно 👍 Переписываю с нуля и надеюсь на лучшее 🔥 Сначала покрываю тестами, потом рефакторю по частям 👾 У нас такого нет — честно-честно На курсе «ИИ для разработчиков» разберём третий подход: как с помощью агента зафиксировать текущее поведение легаси-кода тестами, а затем меня…

👾1

28 Jul 2026, 08:43 UTC515 viewsread 12 August 2026

Когда название файла уже само по себе считается техническим долгом 😊

28 Jul 2026, 07:02 UTC517 viewsread 12 August 2026
Poll

Что означает выравнивание (alignment) типа?

  1. Порядок расположения полей структуры в памяти19%
  2. Гарантия того, что объект лежит только в кэше1%
  3. Автоматическое дополнение структуры до степени двойки24%
  4. Совпадение размеров всех полей внутри структуры6%
  5. Требование к адресу, кратному размеру выравнивания50%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

25 Jul 2026, 17:10 UTC482 viewsread 12 August 2026
Forwarded from @cpp_problems_lib

🔥 Задача на выходные: компаратор-предатель Кажется, безобидная замена < на <=. Но теперь в сет уникальных чисел попадают дубликаты, а find иногда не находит существующий элемент. struct Cmp { bool operator()(int a, int b) const { return a <= b; } }; std::set<int, Cmp> s; s.insert(5); s.insert(5); // s.size() == ? find(5) работает? ✏️ Объясни, почему компаратор обязан быть strict weak ordering, и что именно ло…

Showing the 12 most recent of 20 posts we hold for @cpp_interview_lib. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Polls

The 6 most recent of 7 polls we hold for this entry, as Telegram rendered them when we read the post. A poll’s figures keep moving after that, so each one is dated.

5 Aug 2026, 14:04 UTCAnonymous Quiz214 voters

Какая сложность у std::map::insert?

  1. O(1)22%
  2. O(n)7%
  3. O(log n)64%
  4. O(n log n)7%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

4 Aug 2026, 08:31 UTCAnonymous Quiz95 voters

Какая ошибка возникнет при попытке использовать std::ranges::to для конвертации range в контейнер, не поддерживающий требуемый интерфейс?

  1. Ошибка компиляции77%
  2. Ошибка линковки3%
  3. Runtime ошибка12%
  4. Молчаливое создание пустого контейнера4%
  5. Использование альтернативного метода конструкции4%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

31 Jul 2026, 07:04 UTCAnonymous Quiz115 voters

Где по умолчанию размещается кадр (frame) корутины?

  1. Всегда строго на стеке вызывающего потока38%
  2. В специальном сегменте только для корутин11%
  3. В регистрах процессора для скорости доступа3%
  4. Обычно в куче, но аллокация может быть устранена40%
  5. В статической памяти на всё время программы7%

Shares as published, totalling 99%. No per-option vote count is published by Telegram, so none is shown.

30 Jul 2026, 07:03 UTCAnonymous Quiz113 voters

Что делает ключевое слово co_await?

  1. Завершает корутину и возвращает финальный результат12%
  2. Приостанавливает корутину до готовности awaitable65%
  3. Создаёт новую корутину внутри текущей функции8%
  4. Блокирует поток до завершения дочерней задачи12%
  5. Возвращает очередное значение генератора наружу4%

Shares as published, totalling 101%. No per-option vote count is published by Telegram, so none is shown.

28 Jul 2026, 07:02 UTCAnonymous Quiz139 voters

Что означает выравнивание (alignment) типа?

  1. Порядок расположения полей структуры в памяти19%
  2. Гарантия того, что объект лежит только в кэше1%
  3. Автоматическое дополнение структуры до степени двойки24%
  4. Совпадение размеров всех полей внутри структуры6%
  5. Требование к адресу, кратному размеру выравнивания50%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

24 Jul 2026, 15:00 UTCAnonymous Quiz160 voters

Когда бинарный поиск предпочтительнее хеш-таблицы для поиска элемента?

  1. Когда нужен range query38%
  2. Когда памяти мало40%
  3. Никогда12%
  4. Варианты 1 и 37%
  5. Всегда3%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

Percentages only — there are no per-option vote counts here, because Telegram publishes none. The public post preview gives each option’s share and a single voter total, and nothing else. Multiplying one by the other would produce a per-option tally that looks measured and is not: the shares are rounded to whole numbers before we ever see them. We print what was published and leave the column that does not exist empty.

The shares need not add up to 100. Rounding alone puts many polls at 99 or 101. A poll that allows more than one answer per voter runs well past 100 by design, and several here do. The bars are drawn against a fixed 100% track at each option’s own percentage rather than normalised to the total, so a poll that exceeds it shows that it does instead of being quietly rescaled.

Read from the 20 most recent posts we hold, published 16 July 2026 to 5 August 2026. Telegram labels each poll by kind — an anonymous poll, a quiz, a closed set of final results — and that label is reproduced rather than paraphrased.

Forward network

Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.

Mentions

Named by 5 registered channels — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.

Names

Channels on the register whose handles appear in this channel's posts.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Appears in Telegram’s recommendations for other channels

The reverse of the list above, and a different kind of signal. This does not require this channel to have ever been asked about directly — each row below is a channel we DID ask Telegram about, whose Telegram-generated list happened to include this one. A channel can appear here with an empty list above it, because being named by someone else’s query is independent of having been queried itself.

Библиотека программиста
@proglibrary · 78,288
Telegram ranks this channel #60 of 82 here — alongside 81 others — read 19 August 2026

This channel appears in 1 seed channel's Telegram-generated recommendation list in total. Each is Telegram’s list for THAT channel, not this one — see how this is measured.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 18 September 2026 — this entry's latest reading, not the date you are reading this.

“Библиотека собеса по C++ | вопросы с собеседований” (@cpp_interview_lib), 4,608 subscribers as measured 18 September 2026. Telegram Register, tgregister.com/channel/cpp_interview_lib.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.