#include<iostream>
#include<algorithm>
#include<cmath>
#include<iomanip>
using namespace std;
const double EPS=1e-10;
int N;
double W,X[12],Y[12],R[12],V[12],A[12];
double dp[1<<12][12];
bool meet(double x,double y,double r,int id,double t)
{
	double tx=X[id]+R[id]*cos((V[id]*t+A[id])*M_PI/180);
	double ty=Y[id]+R[id]*sin((V[id]*t+A[id])*M_PI/180);
	return (x-tx)*(x-tx)+(y-ty)*(y-ty)<r*r+EPS;
}
double calc(double x,double y,int id,double t)
{
	double l=0,r=1;
	while(!meet(x,y,r*W,id,t+r))l=r,r*=2;
	for(int c=0;c<100;c++)
	{
		double mid=(l+r)/2;
		if(meet(x,y,mid*W,id,t+mid))r=mid;
		else l=mid;
	}
	return r;
}
main()
{
	cin>>N>>W;
	for(int i=0;i<N;i++)cin>>X[i]>>Y[i]>>R[i]>>V[i]>>A[i];
	for(int i=0;i<1<<N;i++)for(int j=0;j<N;j++)dp[i][j]=1e150;
	for(int i=0;i<N;i++)
	{
		dp[1<<i][i]=calc(0,0,i,0);
	}
	for(int i=1;i<1<<N;i++)for(int j=0;j<N;j++)if(i>>j&1)
	{
		double x=X[j]+R[j]*cos((V[j]*dp[i][j]+A[j])*M_PI/180);
		double y=Y[j]+R[j]*sin((V[j]*dp[i][j]+A[j])*M_PI/180);
		for(int k=0;k<N;k++)if(!(i>>k&1))
		{
			dp[i|1<<k][k]=min(dp[i|1<<k][k],dp[i][j]+calc(x,y,k,dp[i][j]));
		}
	}
	double ans=1e150;
	for(int i=0;i<N;i++)ans=min(ans,dp[(1<<N)-1][i]);
	cout<<fixed<<setprecision(16)<<ans<<endl;
}