Turn the corner
Problem Description
Mr. West bought a new car! So he is travelling around the city.
One day he comes to a vertical corner. The street he is currently in has a width x, the street he wants to turn to has a width y. The car has a length l and a width d.
Can Mr. West go across the corner?
One day he comes to a vertical corner. The street he is currently in has a width x, the street he wants to turn to has a width y. The car has a length l and a width d.
Can Mr. West go across the corner?
![](https://www.cnblogs.com/data/images/2438-1.jpg)
Input
Every line has four real numbers, x, y, l and w. Proceed to the end of file.
Output
If he can go across the corner, print "yes". Print "no" otherwise.
Sample Input
10 6 13.5 4 10 6 14.5 4
Sample Output
yes no
#include<iostream>
#include<math.h>
using namespace std;
#define PI acos(-1.0)
double l,w,x,y;
double lmx(double a)
{
return (l*cos(a)+w*sin(a)-x)*tan(a)+w*cos(a);
}
int main()
{
while(cin>>x>>y>>l>>w)
{
double head=0,rear=PI*1/2,mid1,mid2;
while((rear-head>1e-6))
{
mid1=(rear+head)/2;
mid2=(mid1+rear)/2;
if(lmx(mid1)>lmx(mid2)) rear=mid2;
else head=mid1;
}
if(lmx(mid1)<=y) cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
return 0;
}
为了明天所以选择坚定的执着今天。