freeCodeCamp/curriculum/challenges/chinese/08-coding-interview-prep/project-euler/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.chinese.md

id, challengeType, title, videoUrl, localeTitle

id	challengeType	title	videoUrl	localeTitle
5900f4231000cf542c50ff34	5	Problem 181: Investigating in how many ways objects of two different colours can be grouped		问题181：调查两种不同颜色的对象可以分组的方式

Description

有三个黑色物体B和一个白色物体W它们可以用7种方式分组：（BBBW）（B，BBW）（B，B，BW）（B，B，B，W）（B，BB，W） （BBB，W）（BB，BW）在六十个黑色物体B和四十个白色物体W的分组方式中有多少种？

Instructions

Tests

tests:
  - text: <code>euler181()</code>应该返回83735848679360670。
    testString: 'assert.strictEqual(euler181(), 83735848679360670, "<code>euler181()</code> should return 83735848679360670.");'

Challenge Seed

function euler181() {
  // Good luck!
  return true;
}

euler181();

Solution

// solution required