#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
using Bint = mp::cpp_int;
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int q;
    cin >> q;
    set<int> v;
    set<pair<int, int>> e;
    set<tuple<int,int,int>> f; 
    rep(i,q) {
        vector<int> vs(3);
        rep(j,3) cin >> vs[j];
        rep(j,3) v.emplace(vs[j]);
        e.emplace(vs[0],vs[1]);
        e.emplace(vs[0],vs[2]);
        e.emplace(vs[1],vs[2]);
        f.emplace(vs[0],vs[1],vs[2]);
    }
    cout << v.size() - e.size() + f.size() << endl;
    return 0;
}