Detail of message

Online Judge

Problem Set

Authors

Online Contests

User

Web Board
Home Page
F.A.Qs
Statistical Charts

Current Contest
Past Contests
Scheduled Contests
Award Contest

这样算概率，有错吗？

Posted by achilles at 2005-08-28 16:49:18 on Problem 2598
In Reply To:我理解成了交点个数的期望………… Posted by:TN at 2005-08-28 16:45:08

const double PI = acos(-1.0);

double f(double a)
{
	double d, t;
	if (a > 1) t = 1/a;
	else t = 1;
	d = 2*a*t*acos(t) - 2*sqrt(a*a - a*t*a*t) + 2*a;
	d /= PI;
	return d;
}

Followed by:

Re:这样算概率，有错吗？ (87) Grope 2005-08-28 18:03:53

Post your reply here:

Home Page Go Back To top