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

struct PairHash {
    size_t operator()(const pair<int,int>& p) const {
        return ((size_t)p.first) * 31ULL + (size_t)p.second;
    }
};

struct TripleHash {
    size_t operator()(const tuple<int,int,int>& t) const {
        auto [a, b, c] = t;
        size_t h1 = std::hash<int>()(a);
        size_t h2 = std::hash<int>()(b);
        size_t h3 = std::hash<int>()(c);
        return h1 * 131ULL + h2 * 137ULL + h3;
    }
};

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int Q;
    cin >> Q;

    unordered_set<int> V;
    unordered_set<pair<int,int>, PairHash> E;
    unordered_set<tuple<int,int,int>, TripleHash> F;

    for (int i = 0; i < Q; i++){
        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});
    }

    int ans = V.size() - E.size() + F.size();
    cout << ans << endl;
    return 0;
}