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貌似有这样的测试用例： 4 0 0 9 之类的吧。

Posted by Brinews at 2008-04-20 11:46:33 on Problem 1942
In Reply To:结束条件也需注意啊！ Posted by:200593141 at 2008-03-15 09:46:12 
> while(scanf("%lf %lf", &m, &n)!= EOF && (m !=0 || n != 0)) =》 AC
> while(scanf("%lf %lf", &m, &n)!= EOF && m !=0 && n != 0) => WA
> 就因为这 又贡献了无数WA
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