chore(i18n,learn): processed translations (#44851)

curriculum/challenges/japanese/10-coding-interview-prep/project-euler/problem-267-billionaire.md

@@ -0,0 +1,48 @@
+---
+id: 5900f4771000cf542c50ff8a
+title: 'Problem 267: Billionaire'
+challengeType: 5
+forumTopicId: 301916
+dashedName: problem-267-billionaire
+---
+
+# --description--
+
+You are given a unique investment opportunity.
+
+Starting with £1 of capital, you can choose a fixed proportion, $f$, of your capital to bet on a fair coin toss repeatedly for 1000 tosses.
+
+Your return is double your bet for heads and you lose your bet for tails.
+
+For example, if $f = \frac{1}{4}$, for the first toss you bet £0.25, and if heads comes up you win £0.5 and so then have £1.5. You then bet £0.375 and if the second toss is tails, you have £1.125.
+
+Choosing $f$ to maximize your chances of having at least £1,000,000,000 after 1,000 flips, what is the chance that you become a billionaire?
+
+All computations are assumed to be exact (no rounding), but give your answer rounded to 12 digits behind the decimal point in the form 0.abcdefghijkl.
+
+# --hints--
+
+`billionaire()` should return `0.999992836187`.
+
+```js
+assert.strictEqual(billionaire(), 0.999992836187);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function billionaire() {
+
+  return true;
+}
+
+billionaire();
+```
+
+# --solutions--
+
+```js
+// solution required
+```