#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double ld;
#ifdef APURBA
#include "DEBUG_TEMPLATE.h"
#else
#define HERE
#define debug(args...)
#endif
#define ALL(x) x.begin(),x.end()
const int N=1e3+5;
int n,D;
int x[N],y[N],vx[N],vy[N];
bool done[N];

pair<ld,ld> getpos(int who, ld tm)
{
    ld X=x[who]+vx[who]*tm;
    ld Y=y[who]+vy[who]*tm;
    return make_pair(X,Y);
}
ld getdist(pair<ld,ld> A, pair<ld,ld> B)
{
    A.first-=B.first;
    A.second-=B.second;

    return sqrtl(A.first*A.first+A.second*A.second);
}

ld get(int a,int b,ld after)
{
    ld X=x[a]-x[b];
    ld Y=y[a]-y[b];
    ld VX=vx[a]-vx[b];
    ld VY=vy[a]-vy[b];

    ld A=VX*VX+VY*VY,B=2.0*X*VX+2.0*Y*VY,C=X*X+Y*Y-1.0*D*D;

    ld vit=B*B-4*A*C;
    if(vit<0)
        return 1e9;
    vit=sqrtl(vit);
    ld t=(-B-vit)/(2.0*A);
    if(t>=after)
        return t;
    pair<ld,ld> posa=getpos(a,after);
    pair<ld,ld> posb=getpos(b,after);
    ld dist1=getdist(posa,posb);
    if(dist1<=D)
        return after;
    else
        return 1e9;
}

ld ans[N];

void TEST_CASES()
{
    cin>>n>>D;
    for(int i=0; i<=n; i++)
        cin>>x[i]>>y[i]>>vx[i]>>vy[i];
    priority_queue<pair<ld,int>>pq;
    pq.push({0.,0});
    for(int i=1; i<=n; i++)
        ans[i]=1e9;
    while(!pq.empty())
    {
        int z=pq.top().second;
        ld tm=-pq.top().first;

        pq.pop();
        if(done[z])
            continue;
        done[z]=true;
        ans[z]=tm;

        for(int i=0; i<=n; i++)
        {
            if(done[i]) continue;
            ld when=get(z,i,tm);
            if(when==1e9) continue;
            pq.push({-when,i});
        }
    }
    for(int i=1; i<=n; i++)
    {
        if(ans[i]==1e9) cout<<"-1\n";
        else
            cout<<fixed<<setprecision(15)<<ans[i]<<"\n";
    }
}


/*
*/

int32_t main()
{
#ifndef APURBA
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
#endif
    //freopen("input.txt","r",stdin);
    //freopen("out1.txt","w",stdout);
    int t=1;
    //cin>>t;
    while(t--)
    {
        TEST_CASES();
    }
    return 0;
}