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freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-228-minkowski-sums.md

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---
id: 5900f4511000cf542c50ff63
title: 问题228Minkowski Sums
challengeType: 5
videoUrl: ''
---
# --description--
设Sn是常规的n边多边形 - 或形状 - 其顶点
vkk = 1,2...n有坐标
```
xk = cos( 2k-1/n ×180° ) yk = sin( 2k-1/n ×180° )
```
每个Sn都被解释为由周边和内部的所有点组成的填充形状。
两个形状S和T的Minkowski和S + T是结果
将S中的每个点添加到T中的每个点其中以坐标方式执行点添加
uv+xy=u + xv + y
例如S3和S4的总和是六边形如下面粉红色所示
S1864 + S1865 + ... + S1909有多少方面
# --hints--
`euler228()`应返回86226。
```js
assert.strictEqual(euler228(), 86226);
```
# --solutions--