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请问最简性那部分公式中"a(b+d)-b(a+c)=ad-bc=1"处，这个为什么等于1？ |
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这个的应用是什么？ |
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USACO1.2 Ordered Fractions |
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订正：Stern-Brocot树不是数据结构，只是一个结构 |
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谢谢 rqy~ 已经在 OI-wiki/OI-wiki#2902 中修复。 |
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感觉是写反了，应该是b(a+c)-a(b+d)=bc-ad=1 |
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https://oi-wiki.org/misc/stern-brocot/
OI Wiki 是一个编程竞赛知识整合站点，提供有趣又实用的编程竞赛知识以及其他有帮助的内容，帮助广大编程竞赛爱好者更快更深入地学习编程竞赛
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