feat: enable new langs (#42491)

Enable italian and portuguese

curriculum/challenges/italian/10-coding-interview-prep/project-euler/problem-300-protein-folding.md

@@ -0,0 +1,50 @@
+---
+id: 5900f49a1000cf542c50ffac
+title: 'Problem 300: Protein folding'
+challengeType: 5
+forumTopicId: 301954
+dashedName: problem-300-protein-folding
+---
+
+# --description--
+
+In a very simplified form, we can consider proteins as strings consisting of hydrophobic (H) and polar (P) elements, e.g. HHPPHHHPHHPH.
+
+For this problem, the orientation of a protein is important; e.g. HPP is considered distinct from PPH. Thus, there are 2n distinct proteins consisting of n elements.
+
+When one encounters these strings in nature, they are always folded in such a way that the number of H-H contact points is as large as possible, since this is energetically advantageous. As a result, the H-elements tend to accumulate in the inner part, with the P-elements on the outside. Natural proteins are folded in three dimensions of course, but we will only consider protein folding in two dimensions.
+
+The figure below shows two possible ways that our example protein could be folded (H-H contact points are shown with red dots).
+
+The folding on the left has only six H-H contact points, thus it would never occur naturally. On the other hand, the folding on the right has nine H-H contact points, which is optimal for this string.
+
+Assuming that H and P elements are equally likely to occur in any position along the string, the average number of H-H contact points in an optimal folding of a random protein string of length 8 turns out to be 850 / 28=3.3203125.
+
+What is the average number of H-H contact points in an optimal folding of a random protein string of length 15? Give your answer using as many decimal places as necessary for an exact result.
+
+# --hints--
+
+`euler300()` should return 8.0540771484375.
+
+```js
+assert.strictEqual(euler300(), 8.0540771484375);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function euler300() {
+
+  return true;
+}
+
+euler300();
+```
+
+# --solutions--
+
+```js
+// solution required
+```