from decimal import Decimal
from math import sqrt
q = int(input())
okr = list()
cil = list()
for i in range(q):
    a = list(eval(input()))
    a[0],a[1],a[2] = a[0]-4,a[1]-4,a[2]*4
    a = list(map(Decimal,a))
    cil.append(a)#1=5
    r = Decimal(2*(Decimal(50)/Decimal((50-a[2]))))
    d = Decimal(sqrt(a[0]**2 + a[1]**2))
    y = Decimal(d * (Decimal(a[2])/Decimal(50-a[2])))
    try:
        k =  Decimal(abs(a[1]/a[0]))
        x1 = Decimal(sqrt(y**2/(k**2+1)))
        y1 = k*x1
    except:
        y1 = y
        x1 = 0
    if a[0]==0 and a[1] == 0:
        okr.append([(abs(a[0]) +abs(x1))*a[0]/(abs(a[0]+1)),(abs(a[1]) +abs(y1))*a[1]/(abs(a[1]+1)),r,a[0],a[1]])
    elif a[0] == 0:
        okr.append([(abs(a[0]) +abs(x1))*a[0]/(abs(a[0]+1)),(abs(a[1]) +abs(y1))*a[1]/(abs(a[1])),r,a[0],a[1]])
    elif a[1] == 0:
        okr.append([(abs(a[0]) +abs(x1))*a[0]/(abs(a[0])),(abs(a[1]) +abs(y1))*a[1]/(abs(a[1]+1)),r,a[0],a[1]])
    else:
        okr.append([(abs(a[0]) +abs(x1))*a[0]/(abs(a[0])),(abs(a[1]) +abs(y1))*a[1]/(abs(a[1])),r,a[0],a[1]])
res = 0
for i in range(q):
    for c in range(q):
        if okr[i][3] == cil[c][0] and okr[i][4] == cil[c][1]:
            continue
        d = sqrt((okr[i][0] - cil[c][0])**2 + (okr[i][1] - cil[c][1])**2)
        if d*5<= okr[i][2] + 2:
            pass
        print(d*5, okr[i][2] + 2)
print(res)