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>
43 lines
785 B
Markdown
43 lines
785 B
Markdown
---
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id: 5900f4f91000cf542c51000c
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title: 问题397：抛物线上的三角形
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challengeType: 5
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videoUrl: ''
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dashedName: problem-397-triangle-on-parabola
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---
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# --description--
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在抛物线y = x2 / k上，选择三个点A（a，a2 / k），B（b，b2 / k）和C（c，c2 / k）。
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令F（K，X）为整数四元组（k，a，b，c）的数量，使得三角形ABC的至少一个角度为45度，其中1≤k≤K且-X≤a< b <c≤X。
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例如，F（1,10）= 41并且F（10,100）= 12492.找到F（106,109）。
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# --hints--
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`euler397()`应该返回141630459461893730。
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```js
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assert.strictEqual(euler397(), 141630459461893730);
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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 euler397() {
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return true;
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}
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euler397();
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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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