cheeky :)

Amazing brevity

sick lambda

Description says it's supposed to be a pure function... This alters the input parameter.

The plural of "vertex" is "vertices"

"String out, brutha"

Thıs ıs a 7 kyu dıffıculty, not 8 kyu.

oop

Vector: so good, ya gotta include it twice! :)

The description is unclear

tri_bicolor_tiling(5, 2, 2, 2), Equals(18));

... yes - there are 18 ways

tri_bicolor_tiling(6, 2, 2, 2), Equals(54));

... no... there are 36 ways, not 54 ways.

either there's an error in the math or in the description

Having completed this kata, it can be said that, although it is a great problem, there is absolutey NO WAY this should be considered a kyu 5 problem.

At the very least, it is a kyu 4.

There is a reason only 13 people have completed it, because it takes the better part of a day for the same amount of honour one could get in 10 minutes doing kyu 8 problems.

This should be fixed immediately. Who on earth ranked this a kyu 5?

well put :).

very cool

Nice recursion