import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

q = ni()
D = 10 ** 8 + 100
ans = [set(), set(), set()]
for _ in range(q):
    a, b, c = na()
    ans[0].add(a)
    ans[0].add(b)
    ans[0].add(c)
    ans[1].add(a * D + b)
    ans[1].add(a * D + c)
    ans[1].add(b * D + c)
    ans[2].add(a * D * D + b * D + c)
print(len(ans[0]) - len(ans[1]) + len(ans[2]))