#include <bits/stdc++.h>
using namespace std;
#define rep(i, n)  for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
#define all(a) a.begin(),a.end()
#define rsort(a) {sort(all(a));reverse(all(a));}
#define pb emplace_back
#define eb emplace_back
#define lb(v,k) (lower_bound(all(v),(k))-v.begin())
#define ub(v,k) (upper_bound(all(v),(k))-v.begin())
#define fi first
#define se second
#define pi M_PI
#define PQ(T) priority_queue<T>
#define SPQ(T) priority_queue<T,vector<T>,greater<T>>
#define dame(a) {out(a);return 0;}
#define decimal cout<<fixed<<setprecision(15);
#define dupli(a) {sort(all(a));a.erase(unique(all(a)),a.end());}
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef tuple<ll,ll,ll,ll> PPP;
using vi=vector<ll>;
using vvi=vector<vi>;
using vvvi=vector<vvi>;
using vvvvi=vector<vvvi>;
using vp=vector<P>;
using vvp=vector<vp>;
using vb=vector<bool>;
using vvb=vector<vb>;
const ll inf=1001001001001001001;
const ll INF=1001001001;
const ll mod=1000000007;
const double eps=1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);}
template<class T> void yesno(T b){if(b)out("yes");else out("no");}
template<class T> void YesNo(T b){if(b)out("Yes");else out("No");}
template<class T> void YESNO(T b){if(b)out("YES");else out("NO");}
template<class T> void noyes(T b){if(b)out("no");else out("yes");}
template<class T> void NoYes(T b){if(b)out("No");else out("Yes");}
template<class T> void NOYES(T b){if(b)out("NO");else out("YES");}
void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b){ll res=1;a%=mod;while(b){if(b&1)res=res*a%mod;a=a*a%mod;b>>=1;}return res;}

int main(){
    ll n,w;cin>>n>>w;
    vvi v(n,vi(5));
    rep(i,n)rep(j,5)cin>>v[i][j];
    vector<vector<double>> dp(1<<n,vector<double>(n,inf));dp[0][0]=0;
    rep(i,1<<n)rep(j,n)rep(k,n)if(dp[i][j]!=inf&&!(i>>k&1)){
        ll sx=0,sy=0;
        if(i){
            sx=v[j][0]+v[j][2]*cos((v[j][3]*dp[i][j]+v[j][4])*pi/180);
            sy=v[j][1]+v[j][2]*sin((v[j][3]*dp[i][j]+v[j][4])*pi/180);
        }
        double ok=100000000,ng=-0.000000000001;
        while(ok-ng>0.0000000001){
            double md=(ok+ng)/2;
            double dx,dy;
            dx=v[k][0]+v[k][2]*cos((v[k][3]*(dp[i][j]+md)+v[k][4])*pi/180);
            dy=v[k][1]+v[k][2]*sin((v[k][3]*(dp[i][j]+md)+v[k][4])*pi/180);
            double dis=sqrt((dx-sx)*(dx-sx)+(dy-sy)*(dy-sy));
            if(dis/w<=md)ok=md;
            else ng=md;
        }
        chmin(dp[i|(1<<k)][k],dp[i][j]+ok);
    }
    double ans=100000000;
    rep(i,n)chmin(ans,dp[(1<<n)-1][i]);
    decimal;
    out(ans);
    // outvv(dp);
}