blob: eb171f9fe4ab81cdb0a5b900659cba52c8161935 (
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import fileinput
class SetJoin:
def __init__(self, n):
self._parent = [i for i in range(n)]
def rep(self, i):
if self._parent[i] != i:
self._parent[i] = self.rep(self._parent[i])
return self._parent[i]
def join(self, i, j):
self._parent[self.rep(i)] = self.rep(j)
with fileinput.input() as lines:
pts = [tuple(int(x) for x in line[:-1].split(',')) for line in lines]
def dist(p, q):
return (p[0]-q[0])**2 + (p[1]-q[1])**2 + (p[2]-q[2])**2
r = range(len(pts))
d = sorted([(dist(pts[i], pts[j]), i, j) for i in r for j in r if j > i])
sj = SetJoin(len(pts))
for _, j, k in d:
if sj.rep(j) != sj.rep(k):
sj.join(j, k)
sol = pts[j][0] * pts[k][0]
print(sol)
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