OJ-Problems-Source/HDOJ/2438_autoAC.cpp

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#include <iostream>
#include <math.h>
#define PI 3.1415926535898
using namespace std;
double xx,yy,l,w;
double d(double x){
double s=sin(x),c=cos(x);
return yy*c+xx*s-l*s*c;
}
int main(){
double dl,dr,ml,mr;
while(cin >> xx >> yy >> l >> w){
dl=0;dr=PI/2;
while(dr-dl>0.0000001){
ml=dl/3*2+dr/3;
mr=dl/3+dr/3*2;
if(d(ml)<d(mr))dr=mr;else dl=ml;
}
if(w<d(dl))cout << "yes" << endl;
else cout << "no" << endl;
}
return 0;
}