freeCodeCamp

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id	challengeType	title	forumTopicId
5900f3d21000cf542c50fee5	5	Problem 102: Triangle containment	301726

Description

Three distinct points are plotted at random on a Cartesian plane, for which -1000 ≤ x, y ≤ 1000, such that a triangle is formed. Consider the following two triangles: A(-340,495), B(-153,-910), C(835,-947) X(-175,41), Y(-421,-714), Z(574,-645) It can be verified that triangle ABC contains the origin, whereas triangle XYZ does not. Using triangles.txt (right click and 'Save Link/Target As...'), a 27K text file containing the co-ordinates of one thousand "random" triangles, find the number of triangles for which the interior contains the origin. NOTE: The first two examples in the file represent the triangles in the example given above.

Instructions

Tests

tests:
  - text: <code>euler102()</code> should return 228.
    testString: assert.strictEqual(euler102(), 228);

Challenge Seed

function euler102() {
  // Good luck!
  return true;
}

euler102();

Solution

// solution required

1.3 KiB Raw Blame History