Q = int(input())
ABC = [list(map(int, input().split())) for _ in range(Q)]

V = {}
E = {}
F = {}
for abc in ABC:
  abc.sort()
  a, b, c = abc
  V[a] = 1
  V[b] = 1
  V[c] = 1
  E[a, b] = 1
  E[b, c] = 1
  E[a, c] = 1
  F[a, b, c] = 1

print(len(V.keys()) - len(E.keys()) + len(F.keys()))