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Solution

Ran strings on the compiled file, saw that if I guess the password it will dump out the contents of flag.txt.

Lets see what it compares it to. Let's get Ghidra going.

I loaded the binary in ghidra, then launched the code browser. I ran the analyzer when the pop up prompted.

I navigated to the main function in Symbol Tree, then opened the function graph there.

It looks like it generates the thing at runtime or something?

I dropped off this one and didn't wind up working my way back to it.

Next: Unbreakable Encryption