import sys

# sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 63)
# md = 10**9+7
md = 998244353

def norm(i,j):
    x,y=xy[i]
    s,t=xy[j]
    return ((x-s)**2+(y-t)**2)**0.5

def ok(i,j):
    for k in range(n):
        if cross(i,j,k):return False
    return True

def cross(i,j,k):
    x,y=xy[i]
    s,t=xy[j]
    a,b=xy[k*2]
    c,d=xy[k*2+1]
    if ((c-x)*(t-y)-(d-y)*(s-x))*((s-x)*(b-y)-(t-y)*(a-x))<=0:return False
    if ((x-a)*(d-b)-(y-b)*(c-a))*((c-a)*(t-b)-(d-b)*(s-a))<=0:return False
    return True

n,m=LI()
n2=n*2
xy=[None]*n2
for i in range(n):
    x,y,s,t=LI()
    xy[i*2]=(x,y)
    xy[i*2+1]=(s,t)

dist=[inf]*(n2*n2)
for i in range(n2):
    for j in range(i+1):
        if i==j:
            dist[i*n2+j]=0
        elif ok(i,j):
            dist[i*n2+j]=dist[j*n2+i]=norm(i,j)

for j in range(n2):
    for i in range(n2):
        for k in range(i):
            d=dist[i*n2+j]+dist[j*n2+k]
            if d<dist[i*n2+k]:dist[i*n2+k]=dist[k*n2+i]=d

for _ in range(m):
    i,p,j,q=LI1()
    i=i*2+p
    j=j*2+q
    print(f"{dist[i*n2+j]:.7f}")