#include <cassert>
#include <cctype>
#include <cfloat>
#include <climits>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <cfenv>
#include <cinttypes>
#include <cstdint>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <chrono>
#include <forward_list>
#include <initializer_list>
#include <random>
#include <ratio>
#include <regex>
#include <system_error>
#include <tuple>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <shared_mutex>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
constexpr ll INF = 2e18;
constexpr int inf = 2e8;
//ライブラリを貼るところ


//ここまで



void solve(){
    int Q; cin >> Q;
    set<int> V;
    set<pair<int, int>> E;
    set<tuple<int, int, int>> F;
    for(;Q--;){
        int A, B, C; cin >> A >> B >> C;
        V.insert(A);
        V.insert(B);
        V.insert(C);
        E.insert(make_pair(A, B));
        E.insert(make_pair(A, C));
        E.insert(make_pair(B, C));
        F.insert(make_tuple(A, B, C));
    }
    cout << (int)V.size() - (int)E.size() + (int)F.size() << "\n"; 
}



int main(void){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << setprecision(16) << fixed;

    int T = 1;
    for(int i = 0; i < T; ++i) solve();
}