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curriculum/challenges/italian/10-coding-interview-prep/project-euler/problem-398-cutting-rope.md

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+---
+id: 5900f4fa1000cf542c51000d
+title: 'Problem 398: Cutting rope'
+challengeType: 5
+forumTopicId: 302063
+dashedName: problem-398-cutting-rope
+---
+
+# --description--
+
+Inside a rope of length n, n-1 points are placed with distance 1 from each other and from the endpoints. Among these points, we choose m-1 points at random and cut the rope at these points to create m segments.
+
+Let E(n, m) be the expected length of the second-shortest segment. For example, E(3, 2) = 2 and E(8, 3) = 16/7. Note that if multiple segments have the same shortest length the length of the second-shortest segment is defined as the same as the shortest length.
+
+Find E(107, 100). Give your answer rounded to 5 decimal places behind the decimal point.
+
+# --hints--
+
+`euler398()` should return 2010.59096.
+
+```js
+assert.strictEqual(euler398(), 2010.59096);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function euler398() {
+
+  return true;
+}
+
+euler398();
+```
+
+# --solutions--
+
+```js
+// solution required
+```