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

#define For(i, a, b) for(int i = (a); i < (b); i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(int i = (a); i >= (b); i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()

using lint = long long;
using ld = long double;

int INF = 2000000000;
lint LINF = 1000000000000000000;

struct SetupIo {
    SetupIo() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
        cout << fixed << setprecision(15);
    }
} setupio;

int main() {
    set<int> v;
    set<pair<int, int>> e;
    set<tuple<int, int, int>> f;
    int q;
    cin >> q;
    while (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()) << "\n";
}