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结束条件也需注意啊！

Posted by 200593141 at 2008-03-15 09:46:12 on Problem 1942 and last updated at 2008-03-15 09:47:06 
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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