freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-375-minimum-of-subsequences.english.md

---
id: 5900f4e41000cf542c50fff5
challengeType: 5
isHidden: false
title: 'Problem 375: Minimum of subsequences'
forumTopicId: 302037
---

## Description
<section id='description'>
Let Sn be an integer sequence produced with the following pseudo-random number generator:
S0
    = 
    290797 
  Sn+1
    = 
    Sn2 mod 50515093



Let A(i, j) be the minimum of the numbers Si, Si+1, ... , Sj for i ≤ j.
Let M(N) = ΣA(i, j) for 1 ≤ i ≤ j ≤ N.
We can verify that M(10) = 432256955 and M(10 000) = 3264567774119.


Find M(2 000 000 000).
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler375()</code> should return 7435327983715286000.
    testString: assert.strictEqual(euler375(), 7435327983715286000);

```

</section>

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

<div id='js-seed'>

```js
function euler375() {
  // Good luck!
  return true;
}

euler375();
```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```

</section>