79d9012432
* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
66 lines
1.4 KiB
Markdown
66 lines
1.4 KiB
Markdown
---
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id: 5900f4a11000cf542c50ffb4
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challengeType: 5
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title: 'Problem 309: Integer Ladders'
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---
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## Description
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<section id='description'>
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In the classic "Crossing Ladders" problem, we are given the lengths x and y of two ladders resting on the opposite walls of a narrow, level street. We are also given the height h above the street where the two ladders cross and we are asked to find the width of the street (w).
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Here, we are only concerned with instances where all four variables are positive integers.
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For example, if x = 70, y = 119 and h = 30, we can calculate that w = 56.
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In fact, for integer values x, y, h and 0 < x < y < 200, there are only five triplets (x,y,h) producing integer solutions for w:
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(70, 119, 30), (74, 182, 21), (87, 105, 35), (100, 116, 35) and (119, 175, 40).
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For integer values x, y, h and 0 < x < y < 1 000 000, how many triplets (x,y,h) produce integer solutions for w?
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler309()</code> should return 210139.
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testString: assert.strictEqual(euler309(), 210139, '<code>euler309()</code> should return 210139.');
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler309() {
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// Good luck!
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return true;
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}
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euler309();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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