Oliver Eyton-Williams 0bd52f8bd1

and change all the challenges to new `md` format.

2020-11-27 10:02:05 -08:00

id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
5900f4511000cf542c50ff63	Problem 228: Minkowski Sums	5	301871

--description--

Let Sn be the regular n-sided polygon – or shape – whose vertices

vk (k = 1,2,…,n) have coordinates:

xk = cos( 2k-1/n ×180° )

yk = sin( 2k-1/n ×180° )

Each Sn is to be interpreted as a filled shape consisting of all points on the perimeter and in the interior.

The Minkowski sum, S+T, of two shapes S and T is the result of

adding every point in S to every point in T, where point addition is performed coordinate-wise:

(u, v) + (x, y) = (u+x, v+y).

For example, the sum of S3 and S4 is the six-sided shape shown in pink below:

How many sides does S1864 + S1865 + … + S1909 have?

--hints--

euler228() should return 86226.

assert.strictEqual(euler228(), 86226);

function euler228() {

  return true;
}

euler228();

// solution required