/* -*- coding: utf-8 -*-
 *
 * 3029.cc:  No.3029 繧ｪ繧､繝ｩ繝ｼ讓呎焚 - yukicoder
 */

#include<cstdio>
#include<set>
#include<algorithm>
#include<utility>
#include<tuple>

using namespace std;

/* typedef */

using pii = pair<int,int>;
using tp3 = tuple<int,int,int>;
using si = set<int>;
using spii = set<pii>;
using stp3 = set<tp3>;

/* main */

int main() {
  int qn;
  scanf("%d", &qn);

  si v;
  spii e;
  stp3 f;
  
  while (qn--) {
    int a, b, c;
    scanf("%d%d%d", &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 d = v.size() - e.size() + f.size();
  printf("%d\n", d);

  return 0;
}