$ ctf42

fun-type-system

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Fun type system

How to run

Run sbt, then, in the sbt:fun-type-system> prompt, run compile. While you keep the sbt prompt open, sbt will use partial recompilation on subsequent compiles, which substantially speeds it up. Be patient, a successful clean build takes 5m on my laptop to compile ;)

What to do

Change the type Flag = ... line to enter the flag. If the program compiles, congrats! you won. Please keep the =~: after the last character. The string entered as Flag does not contain EPFL{...}, it is only the string inside the curly brackets (if Flag was ABCD then the flag would beEPFL{ABCD}).

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