I heard that XOR and substitution ciphers were both pretty safe, so I decided to combine them together.

main.cpython-38.pyc a3bbb25109e0508cab8e0f116e11bdcb 3K

Hint: I also heard that python-uncompyle6 was pretty good for decompiling bytecode.

This problem is from DMOJ Capture The Flag '20. For more details, please view the contest page.