#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,b) for(int i=0;i<b;i++)
#define rrep(i,b) for(int i=b-1;i>=0;i--)
#define rep1(i,b) for(int i=1;i<b;i++)
#define repx(i,x,b) for(int i=x;i<b;i++)
#define rrepx(i,x,b) for(int i=b-1;i>=x;i--)
#define fore(i,a) for(auto& i:a)
#define rng(x) (x).begin(), (x).end()
#define rrng(x) (x).rbegin(), (x).rend()
#define sz(x) ((int)(x).size())
#define pb push_back
#define fi first
#define se second
#define pcnt __builtin_popcountll

using namespace std;
using namespace atcoder;

using ll = long long;
using ld = long double;
template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>;
template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;}
bool yn(bool a) { if(a) {cout << "Yes" << endl; return true;} else {cout << "No" << endl; return false;}}
#define retval(x) {cout << #x << endl; return;}
#define cout2(x,y) cout << x << " " << y << endl;
#define coutp(p) cout << p.fi << " " << p.se << endl;
#define out cout << ans << endl;
#define outd cout << fixed << setprecision(20) << ans << endl;
#define outm cout << ans.val() << endl;
#define outv fore(yans , ans) cout << yans << "\n";
#define outdv fore(yans , ans) cout << yans.val() << "\n";
#define coutv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define coutv2(v) fore(vy , v) cout << vy << "\n";
#define coutvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define coutvm2(v) fore(vy , v) cout << vy.val() << "\n";
using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>;
using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>;
using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>;
using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>;
using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>;
using mint = modint998244353;
//using mint = modint1000000007;
//using mint = dynamic_modint<0>;
using vm = vector<mint>;
using vvm = vector<vector<mint>>;
vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1};
ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}
#define yes {cout <<"Yes"<<endl;}
#define no {cout <<"No"<<endl;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
#ifdef MY_LOCAL_DEBUG
#define show(x) cerr<<#x<<" = "<<x<<endl
#define showp(p) cerr<<#p<<" = "<<p.fi<<" : "<<p.se<<endl
#define show2(x,y) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<endl
#define show3(x,y,z) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<endl
#define show4(x,y,z,x2) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<" : "<<#x2<<" = "<<x2<<endl
#define test(x) cout << "test" << x << endl
#define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define showv2(v) fore(vy , v) cout << vy << "\n";
#define showvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define showvm2(v) fore(vy , v) cout << vy.val() << "\n";
#else
#define show(x)
#define showp(p)
#define show2(x,y)
#define show3(x,y,z)
#define show4(x,y,z,x2)
#define test(x)
#define showv(v)
#define showv2(v)
#define showvm(v)
#define showvm2(v)
#endif

typedef complex<ld> pt;
ld dot(pt a, pt b) { return real(conj(a) * b); }
ld cross(pt a, pt b) { return imag(conj(a) * b); }
namespace std {
	bool operator<(const pt& lhs, const pt& rhs) {
		return lhs.real() == rhs.real() ? lhs.imag() < rhs.imag() : lhs.real() < rhs.real();
	}
}
struct Line {
	pt a, b;
   Line(pt a,pt b) : a(a),b(b){}
};
struct Circle {
	pt p; ld r;
   Circle(pt p,ld r) : p(p),r(r){}
};
int ccw(pt a, pt b, pt c) {
	b -= a; c -= a;
	if (cross(b, c) > eps)return 1;//counter clockwise
	if (cross(b, c) < -eps)return -1;//clock wise
	if (dot(b, c) < 0)return 2;//c--a--b on line
	if (norm(b) < norm(c))return -2;//a--b--c on line
	return 0; //a--c--b on line
}
bool eq(ld a, ld b) {
	return abs(a - b) < eps;
}
//2直線の交差判定
bool is_ll(Line l, Line m) {
	return !eq(cross(l.b - l.a, m.b - m.a), 0);
}
//直線と線分の交差判定
bool is_ls(Line l, Line s) {
	return (cross(l.b - l.a, s.a - l.a) * cross(l.b - l.a, s.b - l.a) < eps);
}
//点が直線上に存在するか
bool is_lp(Line l, pt p) {
	return (abs(cross(l.b - p, l.a - p)) < eps);
}
//点が線分上に存在するか
bool is_sp(Line s, pt p) {
	//誤差がis_lpに比べて大きいので、できるだけis_lpを使う
	return (abs(s.a - p) + abs(s.b - p) - abs(s.b - s.a) < eps);
}
//線分と線分の交差判定
bool is_ss(Line s, Line t) {
	return ccw(s.a, s.b, t.a) * ccw(s.a, s.b, t.b) <= 0 && ccw(t.a, t.b, s.a) * ccw(t.a, t.b, s.b) <= 0;
}
//点から直線への垂線の足
pt proj(Line l, pt p) {
	ld t = dot(p - l.a, l.a - l.b) / norm(l.a - l.b);
	return l.a + t * (l.a - l.b);
}
//直線と直線の交点
//平行な２直線に対しては使うな！！！！
pt inter_ll(Line s, Line t) {
	pt sv = s.b - s.a; pt tv = t.b - t.a;
	return s.a + sv * cross(tv, t.a - s.a) / cross(tv, sv);
}
//直線と点の距離
ld dist_lp(Line l, pt p) {
	return abs(p - proj(l, p));
}
//円と直線の交点
vector<pt> is_lc(Circle c, Line l) {
	vector<pt> res;
	ld d = dist_lp(l, c.p);
	if (d > c.r + eps)return res;
	ld len = (d > c.r) ? 0.0 : sqrt(c.r * c.r - d * d);
	pt norr = (l.a - l.b) / abs(l.a - l.b);
	res.push_back(proj(l, c.p) + len * norr);
	res.push_back(proj(l, c.p) - len * norr);
	return res;
}

struct edge{
	int from,to;
	ld cost;

	edge(int from_=0,int to_=0,ld cost_=0) : from(from_),to(to_),cost(cost_) {}
};

void solve(){
	int n,m; cin>>n>>m;
	vector<vector<edge>> e(n*2);
	vector<pt> p(n*2);
	rep(i,n){
		rep(j,2){
			int a,b; cin>>a>>b;
			p[n*j + i] = pt(a,b);
		}
	}
	auto distf = [&](int i,int j)->ld{
		pt ptmp = p[i]-p[j];
		ll ret = dot(ptmp,ptmp);
		ld retf = sqrtl(ret);
		return retf;
	};
	rep(i,n) rep(ic,2){
		rep(j,n) rep(jc,2){
			Line l1(p[i+ic*n],p[j+jc*n]);
			bool ok = true;
			rep(k,n){
				if (k == i) continue;
				if (k == j) continue;
				Line l2(p[k],p[k+n]);
				if (is_ss(l1,l2)) ok = false;
			}
			if (!ok) continue;
			int from = i+ic*n;
			int to = j+jc*n;
			if (from==to) continue;
			ld cost = distf(from,to);
			assert(cost>0);
			e[i+ic*n].pb(edge(from, to, cost));
		}
	}
	vector<vd> dist(n*2,vd(n*2,LINF));
	rep(i,n*2){
		mpq<pair<ld,int>> q;
		
		int st = i;
		dist[st][st] = 0;
		q.push({dist[st][st] , st});
		
		while(!q.empty()){
			pair<ld,int> p = q.top();
			q.pop();
			ld dist_dum = p.first;
			int from = p.second;
		
			if (dist[st][from] < dist_dum) continue;
		
			fore(ey , e[from]){
				int to = ey.to;
				ld cost = ey.cost;
		
				if (chmin(dist[st][to] , dist_dum + cost)){
					q.push({dist[st][to] , to});
				}
			}
		}
	}
	vd ans(m);
	rep(i,m){
		vi sg(2);
		rep(j,2){
			int a,b; cin>>a>>b;
			a--; b--;
			sg[j] = a + b*n;
		}
		ans[i] = dist[sg[0]][sg[1]];
		assert(ans[i]<LINF-eps);
	}
	cout << fixed << setprecision(20);
	rep(i,m) cout << ans[i] << endl;

	return;
}

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);

	int t = 1;
	//cin>>t;

	rep(i,t){
		solve();
	}

	return 0;
}