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>
49 lines
818 B
Markdown
49 lines
818 B
Markdown
---
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id: 5900f4e61000cf542c50fff9
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title: 问题378：三角形三元组
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challengeType: 5
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videoUrl: ''
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dashedName: problem-378-triangle-triples
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---
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# --description--
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设T（n）为第n个三角形数，因此T（n）=
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n（n + 1）2
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。
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设dT（n）为T（n）的除数。例如：T（7）= 28且dT（7）= 6。
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令Tr（n）为三元组数（i，j，k），使得1≤i<j <k≤n且dT（i）> dT（j）> dT（k）。 Tr（20）= 14，Tr（100）= 5772，Tr（1000）= 11174776。
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找Tr（60 000 000）。给出答案的最后18位数字。
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# --hints--
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`euler378()`应该返回147534623725724700。
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```js
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assert.strictEqual(euler378(), 147534623725724700);
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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 euler378() {
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return true;
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}
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euler378();
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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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