freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-215-crack-free-walls.md

id	title	challengeType	forumTopicId	dashedName
5900f4431000cf542c50ff56	Problem 215: Crack-free Walls	5	301857	problem-215-crack-free-walls

--description--

Consider the problem of building a wall out of 2×1 and 3×1 bricks (horizontal×vertical dimensions) such that, for extra strength, the gaps between horizontally-adjacent bricks never line up in consecutive layers, i.e. never form a "running crack".

For example, the following 9×3 wall is not acceptable due to the running crack shown in red:

There are eight ways of forming a crack-free 9×3 wall, written W(9,3) = 8.

Calculate W(32,10).

--hints--

euler215() should return 806844323190414.

assert.strictEqual(euler215(), 806844323190414);

--seed--

--seed-contents--

function euler215() {

  return true;
}

euler215();

--solutions--

// solution required