freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-226-a-scoop-of-blancmange.md

---
id: 5900f4511000cf542c50ff62
challengeType: 5
title: 'Problem 226: A Scoop of Blancmange'
forumTopicId: 301869
---

## Description
<section id='description'>
The blancmange curve is the set of points (x,y) such that 0 ≤ x ≤ 1 and  ,where s(x) = the distance from x to the nearest integer.

The area under the blancmange curve is equal to ½, shown in pink in the diagram below.




Let C be the circle with centre (¼,½) and radius ¼, shown in black in the diagram.

What area under the blancmange curve is enclosed by C?Give your answer rounded to eight decimal places in the form 0.abcdefgh
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler226()</code> should return 0.11316017.
    testString: assert.strictEqual(euler226(), 0.11316017);

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler226() {

  return true;
}

euler226();
```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```

</section>