ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
45 lines
876 B
Markdown
45 lines
876 B
Markdown
---
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id: 5900f5071000cf542c510018
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title: 问题410：圆和切线
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challengeType: 5
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videoUrl: ''
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dashedName: problem-410-circle-and-tangent-line
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---
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# --description--
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设C为半径为r的圆，x2 + y2 = r2。我们选择两个点P（a，b）和Q（-a，c），使得穿过P和Q的线与C相切。
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例如，四元组（r，a，b，c）=（2,6,2，-7）满足该属性。
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令F（R，X）为具有该性质的整数四元组（r，a，b，c）的数量，并且0 <r≤R且0 <a≤X。
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我们可以验证F（1,5）= 10，F（2,10）= 52和F（10,100）= 3384.求F（108,109）+ F（109,108）。
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# --hints--
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`euler410()`应该返回799999783589946600。
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```js
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assert.strictEqual(euler410(), 799999783589946600);
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```
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# --seed--
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## --seed-contents--
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```js
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function euler410() {
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return true;
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}
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euler410();
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```
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# --solutions--
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```js
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// solution required
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```
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