---
id: 5
localeTitle: 5900f4e11000cf542c50fff3
challengeType: 5
title: 'Problem 372: Pencils of rays'
---

## Description
<section id='description'> 
Sea R (M, N) el número de puntos de la red (x, y) que satisfacen M <x≤N, M<y≤N and  is odd.<code> 0 Podemos verificar que R (0, 100) = 3019 y R (100, 10000) = 29750422. 
Encuentre R (2 · 106, 109). 



Nota: representa la función de piso. 
</section>

## Instructions
<section id='instructions'> 

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler372()</code> debe devolver 301450082318807040.
    testString: 'assert.strictEqual(euler372(), 301450082318807040, "<code>euler372()</code> should return 301450082318807040.");'

```

</section>

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

<div id='js-seed'>

```js
function euler372() {
  // Good luck!
  return true;
}

euler372();
```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>