#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for (int i = 0; i < (int)n; i++)

struct doub {
  int a;
  int b;
  bool operator < (const doub &rhs) const {
    if (a != rhs.a)
      return a < rhs.a;
    else
      return b < rhs.b;
  }
};

struct trip {
  int a;
  int b;
  int c;
  bool operator < (const trip &rhs) const {
    if (a != rhs.a)
      return a < rhs.a;
    else if (b != rhs.b)
      return b < rhs.b;
    else
      return c < rhs.c;
  }
};

int main() {
  int q;
  cin >> q;
  set<int> v;
  set<doub> e;
  set<trip> f;
  rep(i, q) {
    int a, b, c;
    cin >> a >> b >> c;
    v.insert(a);
    v.insert(b);
    v.insert(c);
    e.insert({a, b});
    e.insert({b, c});
    e.insert({a, c});
    f.insert({a, b, c});
  }
  cout << (int)v.size() - (int)e.size() + (int)f.size() << endl;
  return 0;
}