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想说几点

Posted by spracle_hao at 2009-05-26 14:19:43 on Problem 3625
1. 我也是c++ AC,g++ WA,难道两者处理浮点数方面有讲究??

2. 关于坐标读入问题:用int完全可以,只不过计算距离时有:d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)),(x1-x2)(or(y1-y2))达10^6,平方后10^12,显然超出了int范围,正确的处理方法:d=sqrt(1.0(x1-x2)*(x1-x2)+1.0*(y1-y2)*(y1-y2))

3.题目说了“without rounding”,也就是说不存在四舍五入,那为什么反而("%.2f",ans)AC,而("%.2f",((int)(ans*100))/100.0)WA呢? 

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