#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i,n)for (int i = 0; i < int(n); ++i)
#define rrep(i,n)for (int i = int(n)-1; i >= 0; --i)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
template<class T> void chmax(T& a, const T& b) {a = max(a, b);}
template<class T> void chmin(T& a, const T& b) {a = min(a, b);}
using ll = long long;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

constexpr double INF = 1e18;

struct P {
    int x, y, r, v, a;
};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, w;
    cin >> n >> w;
    vector<vector<double>> dp(n, vector<double>(1 << n, INF));
    vector<P> ps(n);
    rep(i, n) cin >> ps[i].x >> ps[i].y >> ps[i].r >> ps[i].v >> ps[i].a;
    auto pos = [&](int i, double t) -> pair<double, double> {
        double theta = (ps[i].v * t + ps[i].a) * (M_PI / 180);
        return {ps[i].x + ps[i].r * cos(theta), ps[i].y + ps[i].r * sin(theta)};
    };
    auto dist = [&](double x0, double y0, double t0, int i) {
        double l = t0, r = INF;
        rep(_, 120) {
            double c = (l >= 1 ? sqrt(l * r) : (l + r) / 2);
            auto [tmp_x, tmp_y] = pos(i, c);
            tmp_x -= x0; tmp_y -= y0;
            double tmp_dist = tmp_x * tmp_x + tmp_y * tmp_y;
            double d = (c - t0) * w;
            if (d * d >= tmp_dist) r = c;
            else l = c;
        }
        return r;
    };
    rep(i, n) {
        dp[i][1 << i] = dist(0, 0, 0, i);
    }
    rep(s, 1 << n) rep(i, n) {
        double t0 = dp[i][s];
        auto [x0, y0] = pos(i, t0);
        if (t0 == INF) continue;
        rep(j, n) {
            if (s & 1 << j) continue;
            int ns = s | 1 << j;
            chmin(dp[j][ns], dist(x0, y0, t0, j));
        }
    }
    double ans = INF;
    rep(i, n) chmin(ans, dp[i][~(~0 << n)]);
    cout << fixed << setprecision(16) << ans << endl;
}