ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
---
|
||
id: 5900f4771000cf542c50ff8a
|
||
title: 问题267：亿万富翁
|
||
challengeType: 5
|
||
videoUrl: ''
|
||
dashedName: problem-267-billionaire
|
||
---
|
||
|
||
# --description--
|
||
|
||
您将获得独特的投资机会。从1英镑的资本开始，你可以选择固定比例f来投注一个公平的硬币投掷1000次投掷。你的回报是对你的投注加倍，你失去了对尾巴的赌注。例如，如果f = 1/4，对于第一次投掷，你下注0.25英镑，如果头部出现你赢得0.5英镑，那么就有1.5英镑。然后你下注0.375英镑，如果第二次折腾是尾巴，你有1.125英镑。选择f以最大限度地提高在1,000次翻转后获得至少1,000,000,000英镑的机会，您成为亿万富翁的机会是多少？假设所有计算都是精确的（没有舍入），但是将答案四舍五入到小数点后面的12位数，形式为0.abcdefghijkl。
|
||
|
||
# --hints--
|
||
|
||
`euler267()`应返回0.999992836187。
|
||
|
||
```js
|
||
assert.strictEqual(euler267(), 0.999992836187);
|
||
```
|
||
|
||
# --seed--
|
||
|
||
## --seed-contents--
|
||
|
||
```js
|
||
function euler267() {
|
||
|
||
return true;
|
||
}
|
||
|
||
euler267();
|
||
```
|
||
|
||
# --solutions--
|
||
|
||
```js
|
||
// solution required
|
||
```
|