The codes from 2016 Facebook Hackercup are still inaccessible!!

When will they fix it!!

[Solved] How to use range based for loops in Cygwin? I couldn't find a good installation guide online. I could only install C++ version 5.xxx

[Question] What are some ways to speed up using cygwin for competitive programming? eg : using aliases.

[Question] How to make cygwin run faster, if possible? I can feel it's a bit slow. I have 4GB RAM on a windows 7 PC and only a few browser tabs open, along with cygwin, and a couple of editors. I am looking for answers online as well, but I'd like to know your personal experience too.

I just came across a problem on expected values, and I didn't understand the editorial at all. Watched a couple of videos on youtube, but they were very basic. Can someone please give me a good source to learn expected values used in competitive programming, such as the last contest had an EV problem. This is the one I'm currently attempting. Even better if someone makes a screencast of them solving such problems. Please help!