#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  vector<array<int, 1>> v;
  vector<array<int, 2>> e;
  vector<array<int, 3>> f;
  int q;
  cin >> q;
  rep(_, q) {
    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});
  }
  sort(all(v)); v.erase(unique(all(v)), v.end());
  sort(all(e)); e.erase(unique(all(e)), e.end());
  sort(all(f)); f.erase(unique(all(f)), f.end());
  cout << ssize(v) - ssize(e) + ssize(f) << '\n';
}