First, download the convert.py file. Run it with the folllowing command.

python3 convert.py

You are prompted with the following text.

If 15 is in decimal base, what is it in binary base?

Every decimal number has a representation in a binary form. For example, take the number 3, which is in the decimal format. In the binary form it is equal to '11'.

First download in the same directory code.py and codebook.txt

Then run the following command and you've got the flag.

python3 code.py

First open up the terminal and connect to the server using SSH.

ssh picoplayer@saturn.picoctf.net -p 53143

You will have different port and password, so just enter those provided.

When you are connected to the server navigate to the following path.

cd /challenge
cat metadata.json

You will see the flag. Good job.

First use wget to download the big-zip-files.zip file. Then unzip it.

wget https://artifacts.picoctf.net/c/503/big-zip-files.zip
unzip -u big-zip-files.zip

What does this bDNhcm5fdGgzX3IwcDM1 mean? I think it has something to do with bases.

Run the following command in the terminal.

echo 'bDNhcm5fdGgzX3IwcDM1' | base64 -d

Can you convert the number 42 (base 10) to binary (base 2)?

Every decimal number has a representation in a binary form. For example, take the number 3, which is in the decimal format. In the binary form it is equal to '11'.