HDU 2438 Turn the corner

题解在此：点击打开链接

#include 
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;

#define eps 1e-5
const double pi=acos(-1.0);

double x,y,l,w;

double Cal(double k)
{
    return l*cos(k)+(w-x*cos(k))/sin(k);
}

double T_Find()
{
    double l=0,r=pi/2,ll,rr;
    while(r-l>eps)
    {
        ll=l+(r-l)/3;
        rr=r-(r-l)/2;
        double Ans1=Cal(ll),Ans2=Cal(rr);
        if(Ans1