#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#pragma GCC optimize("O3")
int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int Q;
  cin >> Q;
  vector<int> V;
  vector<array<int, 2>> E;
  vector<array<int, 3>> F;
  for (int i = 0; i < Q; i++) {
    int A, B, C;
    cin >> A >> B >> C;
    V.push_back(A);
    V.push_back(B);
    V.push_back(C);
    E.push_back({A, B});
    E.push_back({B, C});
    E.push_back({A, C});
    F.push_back({A, B, C});
  }
  ranges::sort(V);
  ranges::sort(E);
  ranges::sort(F);
  int ans = 0;
  ans += unique(V.begin(), V.end()) - V.begin();
  ans -= unique(E.begin(), E.end()) - E.begin();
  ans += unique(F.begin(), F.end()) - F.begin();
  cout << ans << '\n';
  return 0;
}
/*
  File : ~/yukicoder/528/C.cpp
  Date : 2025/02/21
  Time : 21:52:29
*/