suggest to add sctf writeup about write-ups-2015 HOT 4 CLOSED

@abdilahrf can you create a pull request?

from write-ups-2015.

@dhanvi I can't separate the category

from write-ups-2015.

@abdilahrf It's not that hard to put the problem into a category, I can sort them out for you

just add a comment to this issue if you find any thing difficult to sort the challenges

(you can always put the challenge into misc if you think it's completely different or a mix of all )

from write-ups-2015.

Added by @abdilahrf , closed :)!

from write-ups-2015.