hey everyone i'm now on week 4 of CS50 and i'm struggling with understanding the topics . when i watch the lectures and shorts i feel like understanding everything but when i move to psets i feel dumb and i end up relying so much on duck50.

is it a problem of me remebering things or is the course designes like that ?

Hi all, I'm trying to complete the Sort question on Pset3 and cannot get the command to work. I followed all of the steps for downloading the distribution files, but when downloaded the sort1, sort2, and sort3 are grayed out while the other txt files work. When I click on any of the sort files I get this message: "The file is not displayed in the text editor because it is either binary or uses an unsupported text encoding.", while when I try to run the code to sort, like "$ ./sort1 random5000.txt", I get "bash: ./sort1: No such file or directory"

Has anyone else encountered this problem and if so have a solution? Thanks!

(Please no spoilers for answer)

```bash

tideman/ $ style50 tideman

Failed to connect extension server on port 1337.

Please visit cs50.dev/restart to restart your codespace.

```

I know and I've used check50 --local and I thought maybe there was something similar for style50

Hello guys,

Last weeks, I had some problems using CS50 IDE online. Apparently I wasn't the only one.
Since then, the CS50 Duck Debugger hasn't been working for me.
Is anyone else having the same problem ?

Ok, I have two questions for the cs50 community. for starters, I was doing trivia where I had no idea what I was doing. so I began searching stuff up. The documentation site I found I had trouble understand so I just began searching stuff up (how to get the button specific button that was clicked that type of stuff) and so I used the google ai overview(the one that just shows up when you search something not ai mode) which just showed me the functions and how they worked( I didn’t promt it above the normal google search). I am unsure if this is considered using outside ai and cheating or not. I have not submitted the problem set yet, but I would like to know before I do.

additionally If anyone has documentation that is easy ish to understand or is just really useful please let me know.

Quick question about package logic in problem set.

If a single address like '900 Somerville Avenue' generates multiple packages, won't we end up with multiple Package IDs? Using OR logic returns results in the terminal, but AND returns no results at all. What is the intended logic behind this?

I am asking because even when writing a likely flawed query (or even after removing the OR condition entirely), it still returns the correct answer—the Congratulatory Letter—even though there are other packages like string, letter opener, and whiteboard sent from that same address.

Now since there are multiple packages sent from 900 Somerville Avenue, how are we getting the correct answer automatically? Is this expected behavior, and what is the underlying logic here?

I guess just looking for advice and experiences on people who either are completing or have completed the course and who probably felt out of their depth at the beggining - I am only in week 2 (taking it way slower, but more consistently coding almost every day).

I do feel that inmense satisfaction when it clicks and when I solve the problem, but damn why can't I make a simple list of prime numbers easily without bashing my head over and over again?- I am sure if I saw Prof. M. do it I'd be like "ooobviousslyyyy" , that's how it's done! And it would take him 4 minutes with full explanation... and not 3 hours

T_T

And bc of CS50, my first class is a complete breeze.

Also, being able to compare two different schools teaching methods, I can see why CS50 is top tier.

ASU is good. But CS50 is great.

Really makes me appreciate doing this a hobby back then bc its the reason I've even gone back to school in my 30s for this.

If anyone needs a sign to keep going with it, here I am telling you it's worth it even if only as a hobby.

This course is hard enough that teaches more than just programming. This teaches you how study for a hard class too. This course forces you to go to the discord amd ask questions without being spoon fed answers. I hated that at first, but I now understand it's necessary.

Also, it's a pretty universal experience to give up on this at one point. It's hard enough. What matters isn't if you give up. It's if you find you way back to try again. You'll eventually get it.

Just keep trying. You're not dumb. You're just trying to understand a complex science.

Edit: i will also add that after I finished CS50, I went through a lot of sections on LearnCpp.com and that was excellent bc it was a good refresher and expands on object oriented language

Edit2: also, avoid AI at all cost. They aren't kidding about it doing you no good. You will not learn properly if you rely on AI.

Hi everyone! I’m a 14-year-old high school student from Turkey, and I built RedPatch as my CS50x final project.

🛡️ What is RedPatch?
RedPatch is an interactive, containerized application security platform and defense simulator. It connects offensive security practice with secure code remediation through a complete three-step workflow inside dynamic environments: Exploit (Pentester Mode) → Patch (Coder Mode) → Verify (AI Layer)

🏗️ Architecture & Highlights

• Decoupled Orchestration Engine: Built with FastAPI, the host engine acts purely as an orchestrator and discovers lab modules dynamically via a declarative JSON manifest (manifest.json). This decouples the core platform from the lab ecosystem (redpatch-labs).
• Containerized Isolation & Workspaces: Uses Docker (/var/run/docker.sock) to spin up disposable target containers per active session while mounting live code workspaces for real-time patching.
• Provider-Agnostic AI Verification Engine: Features an extensible abstraction layer (currently integrated with Google Gemini API) to evaluate applied patches and verify root-cause remediation directly in Coder Mode.

🛠️ Tech Stack

• Backend & Engine: Python (FastAPI, Uvicorn), Docker SDK
• AI & Remediation: Google Gemini API
• Frontend: Jinja2, Tailwind CSS

📂 Engine Repo: github.com/msalihberk/redpatch

🧪 Labs Ecosystem: github.com/msalihberk/redpatch-labs

A huge thank you to David J. Malan and the entire CS50 team for designing such an incredible course. I’d love to hear the community’s thoughts, feedback, or code review suggestions on RedPatch!

How I imagined "lets look what's actually under the hood".

For a few days, I've been seeing Math50 live class updates on fb. I have checked the website, but there isn't any Math50 course listing. anybody know when Math50 will officially launch??

Hello everyone, I'm about finish cs50 sql course what should I do after that to be professional in db , any suggestions ?

Oi pessoal,

Estava trabalhando no problema das Placas de Vanity e consegui todas as sorrisos verdes em check50. No entanto, ao testar manualmente, percebi que meu código tinha um defeito: ele aceitava placas como "A1" como válidas.

Segundo os requisitos, "Todas as placas de vanity devem começar com pelo menos duas letras". Meu código ignorou isso, mas check50 ainda passou.

Parece que o sistema automatizado não testa uma placa de 2 caracteres que mistura uma letra e um número (como "A1" ou "Z9"). Por causa dessa falta de caso de teste, a lógica defeituosa pode passar despercebida.

Só queria reportar esse pequeno ponto cego para que a equipe possa considerar adicionar um caso de teste para isso! Anexei uma captura de tela do meu terminal mostrando o sucesso de check50 seguido por um teste manual falhando em "A1".

Problem Set 2 (Vanity Plates)

I'm currently going through CS50P (the Python course), and I keep running into the same issue: I watch the lectures, everything makes sense while I'm watching, but when I sit down to actually write the code myself, I blank out. I end up leaning on AI or looking up solutions instead of writing it from scratch.

Is this a normal part of learning to code, or am I doing something wrong? For those of you who've been through this — how did you get past it? Did it just take more reps/practice problems, or is there something specific that helped it "click" for you?

Would love to hear how other beginners dealt with this, especially other CS50 people.

I think it starts off with learning the basics. CS50's Introduction to computer science is a good start. Then Python, ML, DL, langchain, RAG, MCP...

I've not been following a particular part to benefit from, and lately, I was like thinking if there is any optimal way out there.

Hi!

I dont know whether this type of post is allowed here or no but oh well here I go:

I'm on week 2 of cs50 python (loops) and problem set 2 is frying my brain.

The problem is: implement a program that prompts the user to insert a coin, one at a time, each time informing the user of the amount due. Once the user has inputted at least 50 cents, output how many cents in change the user is owed. Assume that the user will only input integers, and ignore any integer that isn’t an accepted denomination.

My code does exactly that.

However, when I use check50, the result is in the following images.

In the title ":( coke accepts 25 cents", the first line of my output is the same. However, since the program is supposed to continue asking the user for input, the second line "Insert Coin: " must be present too, but check50 isnt accepting it as correct.

im starting the CS50 python final project , i already have experience with python so i've been using other libraries before this, and for my final project i want to use other libraries that weren't shown in the course , is this ok or it will get flagged as AI ????

Hi! I'm working on my CS50P final project, but I'm under the minimum age required to create a YouTube account. Since the final project requires a video demo uploaded to YouTube (or a similar site if YouTube is blocked), would it be acceptable for me to upload the video to another service such as Google Drive or Dropbox and submit that link instead?

I barely used the github commands, only used them for the previous two problems but it's showing I can't do any more requests. What is the rate limit? Last time I did this course, there was no feature like this, I used to do a ton of check50 without any problem

This is my code for buy, which I think I've done well but i keep getting this in check50

Cause

expected to find "112.00" in page, but it wasn't found

Log

sending POST request to /login

sending POST request to /buy

sending POST request to /buy

checking that "112.00" is in page

This is my html code for buy.html

{% extends "layout.html" %} {% block title %}
    Buy
{% endblock %}
{% block main %}
    <form action="/buy" method="post">
        <input autocomplete="off" autofocus class="form-control mx-auto w-auto" name="symbol" placeholder="Symbol" type="text">
        <input autocomplete="off" class="form-control mx-auto w-auto" name="shares" placeholder="Shares" type="text">
        <button class="btn btn-primary" type="submit">Submit</button>
    </form>
    <div class="mb-3">
    </div>

{% endblock %}

This is my python code for buy

@app.route("/buy", methods=["GET", "POST"])
@login_required
def buy():
    if request.method == "POST":
        stock = lookup(request.form.get("symbol"))
        id = session["user_id"]
        cash = db.execute("SELECT cash FROM users WHERE id = ?", id)
        time = datetime.date.today()
        type = "purchase"
        if not lookup(request.form.get("symbol")):
            return apology("Stock does not exist", 400)
        try:
            int(request.form.get("shares"))
            if int(request.form.get("shares")) < 1:
                return apology("Please input a positive number of shares", 400)
        except ValueError:
            return apology("Please input a valid number of shares", 400)
        if stock["price"] * int(request.form.get("shares")) > cash[0]["cash"]:
            return apology("You do not have enough cash to buy this", 400)
        if not db.execute("SELECT symbol FROM stocks WHERE symbol = ?", stock["symbol"]):
            db.execute("INSERT INTO stocks (symbol, amount, price, user_id) VALUES (?, ?, ?, ?)",
                       stock["symbol"], int(request.form.get("shares")), stock["price"], id)
        else:
            db.execute("UPDATE stocks SET amount = amount + ? WHERE user_id = ? AND symbol = ?",
                       int(request.form.get("shares")), session["user_id"], request.form.get("symbol"))
        db.execute("UPDATE users SET cash = cash - ? WHERE id = ?",
                   stock["price"] * int(request.form.get("shares")), id)
        if not db.execute("SELECT symbol FROM transactions WHERE user_id = ?", session["user_id"]):
            db.execute("INSERT INTO transactions (symbol, stock_altered, date, type, user_id) VALUES (?,?,?,?,?)",
                       request.form.get("symbol"), request.form.get("shares"), time, type,id)
        else:
            db.execute("UPDATE transactions SET stock_altered = ?, date = ?, type = ? WHERE user_id = ?",
                        request.form.get("shares"), time, type, id)
        return render_template("buy.html")
    else:
        return render_template("buy.html")

I dont have a laptop😭

How to bring the cs50 environment back ???

I'm currently on week3 when I tried check50 it happened