freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-442-eleven-free-integers.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
5900f5271000cf542c510039	Problem 442: Eleven-free integers	5	302114	problem-442-eleven-free-integers

--description--

An integer is called eleven-free if its decimal expansion does not contain any substring representing a power of 11 except 1.

For example, 2404 and 13431 are eleven-free, while 911 and 4121331 are not.

Let E(n) be the $n$th positive eleven-free integer. For example, E(3) = 3, E(200) = 213 and E(500\\,000) = 531\\,563.

Find E({10}^{18}).

--hints--

elevenFreeIntegers() should return 1295552661530920200.

assert.strictEqual(elevenFreeIntegers(), 1295552661530920200);

--seed--

--seed-contents--

function elevenFreeIntegers() {

  return true;
}

elevenFreeIntegers();

--solutions--

// solution required