2018-10-10 22:03:03 +00:00
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id: 5900f44b1000cf542c50ff5e
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2020-12-16 07:37:30 +00:00
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title: 问题223：几乎是直角三角形I.
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2018-10-10 22:03:03 +00:00
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challengeType: 5
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videoUrl: ''
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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如果边满足a2 + b2 = c2 + 1，让我们称一个整数边三角形，边a≤b≤c几乎不是锐角。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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有多少个几乎没有锐角的三角形，周长≤25,000,000？
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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`euler223()`应该返回61614848。
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert.strictEqual(euler223(), 61614848);
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2018-10-10 22:03:03 +00:00
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2020-08-13 15:24:35 +00:00
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