freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-78-coin-partitions.md

---
id: 5900f3ba1000cf542c50fecd
title: 'Problem 78: Coin partitions'
challengeType: 5
forumTopicId: 302191
dashedName: problem-78-coin-partitions
---

# --description--

Let p(n) represent the number of different ways in which n coins can be separated into piles. For example, five coins can be separated into piles in exactly seven different ways, so p(5)=7.

<div style='text-align: center;'>

| Coin piles        |
| ----------------- |
| OOOOO             |
| OOOO   O          |
| OOO   OO          |
| OOO   O   O       |
| OO   OO   O       |
| OO   O   O   O    |
| O   O   O   O   O |

</div>

Find the least value of `n` for which p(`n`) is divisible by one million.

# --hints--

`coinPartitions()` should return a number.

```js
assert(typeof coinPartitions() === 'number');
```

`coinPartitions()` should return 55374.

```js
assert.strictEqual(coinPartitions(), 55374);
```

# --seed--

## --seed-contents--

```js
function coinPartitions() {

  return true;
}

coinPartitions();
```

# --solutions--

```js
// solution required
```