[gsoc] Prerequisite Skills for Persistent Data Structures Project

[Athreya]

Hi,
    I was interested in working on the project related to 
Persistent Data Structures for GSOC 2019, but the project does 
not mention any expected skills or background. I have coded up 
persistent data structures in C++ for programming competitions, 
but the project description makes it appear that the student 
needs experience with Functional Programming.
I would be grateful if someone could clarify the expected 
prerequisite skills.

Thanks,
Athreya