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    Now enrolling students — limited places

    Aiming
    for 90+

    We work through problems on an online board and write code together in a shared editor.

    EGEOGEPythonC / C++Olympiads
    How a lesson works
    GD

    German Dagil, computer science and programming tutor.45+ students have chosen me for long-term lessons.

    Scroll to the end

    FreeMy Python basics course is open to everyone
    for step in range(1, 5):
    print("Hello!")
    Back to boardsquantutorNetworks: address and maskTrial lessonEditViewGDYou
    Online
    EGE: networksNetwork: 172.16.168.0, mask 255.255.248.0How many addresses have an even number of onesin the binary form of the IP address?Third byte of the address and mask:168 =10101000248 =111110003 bits+ 8 bits of the last byte3 + 8 = 11 free bits2¹¹ = 2048 addresses in totalHow do we find thosewith an even number of 1s?— youSplit the addresses into pairs:the first 31 bits match.…10100…10101Flip 0 to 1 → the parity flips.Exactly one address per pair fits.2048 : 2 = 1024Let’s check it in Python.GermanYou
    quantutorCode rooms ›EGE: networksTimerCopy link
    Filesmain.pynotes.txt
    main.pyRunF10
    1German2345678
    InputOutputErrors
    The program has not run yet
    Participants 2GDGerman DagilYouYouChat

    GermanCheck the parity: the remainder when divided by 2 must be zero.

    A shared board for lessonsWe go through the material together, make notes and sketch solutions.
    Theory and practice on the boardWe cover the material we need and solve the problem.
    A shared code editorWe discuss the solution and write code in the same editor.
    We check by running the codeWe run the code, study the result and save the solution.
    Not memorising templates — understanding the codeWe work out why the solution works, so that when the problem changes you know what to change in the code.
    Below: a sample lesson

    What I teach

    Five directions.
    Pick yours.

    Russian Unified State Exam, grade 11

    EGE

    The goal is not just to pass, but to score as high as possible. We cover all 27 tasks, including the last ones where most points are lost.

    • Solving analytically or with Python
    • Working through your mistakes
    • Every task type in easy and hard variations
    90+
    Russian grade 9 exam

    OGE

    Calmly and step by step: from the basics to the programming tasks.

    • Every OGE task type
    • Coding tasks without fear
    • Goal: a confident top grade
    5
    From zero and beyond

    Python

    The language you need for the exam and after it. We learn to think like a programmer, not to copy code.

    • From zero, or from wherever it stopped making sense
    • Problems, not retold documentation
    • My Python basics course is free (in Russian)
    def solve(n):
    return n * (n + 1) // 2
    For school and olympiads

    C / C++

    What happens inside a program: types, memory, pointers, classes. So that code stops being magic.

    • Pointers and memory, made visual
    • OOP and data structures
    • What every line actually does
    int* p = &a[2];
*p += 1;
    Competitive programming

    Olympiads

    Problems where no template helps. We learn to find the idea and prove the solution is correct.

    • Dynamic programming, graphs, combinatorics
    • Estimating algorithm complexity
    • Looking for the idea, not ready-made code
    O(n log n)

    This is not a lesson where you just sit and listen.

    We work on problems together: we discuss ideas, try different approaches, write code and check the solution as we go.

    If a step is still unclear, we can always stop and go through it in detail — at another pace, from another angle, until it clicks.

    • No stress, no boredom
    • Real conversation
    • Practice
    • Honesty

    Between lessons

    My courses.
    On top.

    In my courses, theory comes in short steps and is reinforced right away with questions, quizzes and problems. You can come back to a topic later — and ask me if something does not add up.Interactive courses do not cover every topic yet — I am actively writing more. Courses are in Russian for now.

    quantutor
    IPv4: addresses and subnetsCourse points 3 / 7
    OverviewSaved
    Contents
    1. 1.1Binary and the mask
    2. 1.2Network address from a mask
    3. 1.3Python: ipaddress
    4. 1.4Exam-style practice
    123Step 2 of 3
    EGE networks task

    A host has the IP address 172.16.170.37, mask 255.255.248.0. Find the network address.

    1. 1IP address
    2. 2Mask
    3. 3Bitwise AND
    4. 4Network address
    5. 5Range

    Each octet is eight bits. The last one: 37 = 32 + 4 + 1. The whole address is 32 bits.

    Octets 1–2: mask 255, so they stay the same. Watch 3 and 4.

    Octet 1172
    IP10101100
    M11111111
    N10101100
    —
    Octet 216
    IP00010000
    M11111111
    N00010000
    —
    Octet 3170
    IP10101010
    M11111000
    N10101000
    —
    Octet 437
    IP00100101
    M00000000
    N00000000
    —
    Mask 255.255.248.0Network address 172.16.168.0Range 172.16.168.0 – 172.16.175.255, total 2048 addresses
    Step 1 of 5
    Free for everyone

    Python basics course — on me.

    Python pays off in the exam too: many tasks are easier to solve with a program. Message me and I will open access to the course (in Russian). No lessons to buy.

    A little practice

    One problem each.
    Three directions.

    Pick a direction and try to solve the problem. You can open a hint or go straight to the walkthrough.

    EGE, networks

    Network address from an IP address and mask

    A host has the IP address 192.168.97.200 and the network mask 255.255.240.0.

    What is the network address?

    A simplified task.

    The network address is the bitwise AND of the address and the mask. Mask bytes of 255 keep the address byte unchanged, a 0 byte gives 0. That leaves the third byte: 97 and 240.

    Your answer

    Short learning examples adapted from exam-style tasks — not a level test. Answers are checked in your browser only.

    Let’s work through problems like these together.

    The first lesson is free. Whether to continue is up to you afterwards.

    Your goal

    What score
    are you after?

    Move the slider and see what your goal really means in the Russian state exams.

    90of 100

    90 points means

    top ≈5%

    ≈5% of candidates score this or more. You would beat ≈95%.

    100%50%0%
    ≈5% score 90+
    020406080100

    The curve shows what share of candidates score that much or more. Click to pick a goal.

    Study plan

    Lesson map. For your direction.

    Pick a direction — the plan changes

    Stage 1 of 6. Tasks 1, 4, 7, 11

    Information and representation

    Learn to extract useful information from graphs, tables and binary codes.

    All 27 tasks of the Russian Unified State Exam. Numbering follows the EGE 2027 draft.

    Terms

    Easy to try.
    No packages upfront.

    1. The trial lesson is free
    2. Pay after the lesson
    3. Flexible schedule
    4. Questions between lessons
    5. A platform for student and parent
    6. Free lessons for recommending friends
    01 / 06

    The trial lesson is free

    We get to know each other, solve a couple of problems together and see whether the format suits you.

    02 / 06

    Pay after the lesson

    Pay within a week after the lesson. No packages upfront and no obligation to continue.

    03 / 06

    Flexible schedule

    We pick the time together. Rescheduling and extra lessons by arrangement.

    04 / 06

    Questions between lessons

    Stuck on a problem or in a course? Message me in a messenger or right on the platform. It has its own chat that works even when messengers are unavailable.

    05 / 06

    A platform for student and parent

    The student and the parent each have their own account. The parent sees lessons, assignments and progress in read-only mode, plus the payment records.

    06 / 06

    Free lessons for recommending friends*

    Recommend me to friends, acquaintances or classmates and get free lessons.

    * additional terms apply.

    How to start

    Four steps —
    and we are working together.

    01

    Message me

    On Telegram or WhatsApp: your grade, goal and a convenient time. I reply personally.

    GDGerman Dagilcomputer science tutor

    Hello! I am interested in exam prep in computer science — any places left? Grade 10.

    Hi! There are still places. Let’s do a free trial lesson this week — when suits you?

    02

    Free trial lesson

    We get to know each other, see your level and solve a couple of problems together — on the board and in code.

    Trial lesson

    Parameters vs arguments — what is the difference?

    Parameters in the definition, arguments in the call.

    GermanYou
    03

    A plan for your goal

    We decide which topics come first and what runs in parallel, and agree on a schedule.

    EGE study planInformation and encodingfirstPython and datanextTasks 24, 26, 27in parallelFull practice paperscloser to the exam
    04

    Regular lessons

    We work together on the board and in code; between lessons there are my courses and materials. Payment after the lesson.

    MoTulessonWeThFrlessonSaSu
    Course: EGE — tasks 19–21

    I didn’t get the extra recursion material — can we go over it in class?

    Questions

    Good to know

    Still have a question?

    Can I start from zero?

    Yes. You do not need to learn Python or work through past papers first. In the trial lesson we will see what you already know and decide where to start.

    What happens in the trial lesson?

    We get to know each other, talk about your goal and what feels hard right now, and solve a couple of problems together — on the board and in code. The trial is free, with no obligation to continue.

    I am a parent. Can we talk first?

    Of course. Tell me what help is needed and what worries you — we will discuss the goal, the schedule and how to keep you informed. You get your own account on the platform with lessons, assignments, progress and payment records. And we will make sure to hear from the student too.

    One-to-one or in a small group?

    Whichever you prefer and whatever is available. One-to-one when you need your own pace. A small group brings together students with a similar goal and level — whether one is open right now, we will discuss personally.

    What do I need for online lessons?

    A computer or laptop, an internet connection and a way to talk. We meet on a video call; the board, code editor, materials and courses live on my platform, QuanTutor.

    Is the Python course really free?

    Yes. Message me and I will open access to the Python basics course on QuanTutor. You do not need to buy lessons. The course is currently in Russian.

    When and how do I pay?

    The trial is free. Regular lessons are paid after they take place, within a week. We agree on the price and schedule in advance — no packages to buy upfront.

    The first lesson
    is free.

    Tell me about your goal. We will solve a couple of problems together — on the board and in code. Whether to continue is up to you.

    Enrolment is open, but places are limited — best to arrange early.

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    Free

    Free trial lesson

    We get to know each other, talk about your goal and solve a couple of problems together — on the board and in code. Whether to continue is up to you afterwards.

    Message me and we will find a timeI reply personally, usually within a day.
    TelegramWhatsApp
    +7 919 373-66-31
    Python basics course

    How to get access

    1. 1Message me: “I would like access to the Python course”.
    2. 2I will open the course for you in my organisation on QuanTutor.
    3. 3Go at your own pace (the course is in Russian). No lessons to buy.
    TelegramWhatsApp
    +7 919 373-66-31
    Contact

    Message me

    I will answer any questions.

    TelegramWhatsApp
    +7 919 373-66-31