#include <bits/stdc++.h>
#ifdef dbg
#define D(...) fprintf(stderr, __VA_ARGS__)
#define DD(...) D(#__VA_ARGS__ " = "), debug_helper::debug(__VA_ARGS__), D("\n")
#include "C:\Users\wsyear\Desktop\OI\templates\debug.hpp"
#else
#define D(...) ((void)0)
#define DD(...) ((void)0)
#endif
#define rep(i, j, k) for (int i = (j); i <= (k); ++i)
#define per(i, j, k) for (int i = (j); i >= (k); --i)
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
using ll = long long;
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;

using namespace std;

const int N = 5010;

int n, k, ans, a[N];
bitset<N> s[51];

int main() {
  cin.tie(nullptr) -> ios::sync_with_stdio(false);
  cin >> n;
  rep (i, 1, n) {
    cin >> k;
    rep (j, 1, k) cin >> a[i];
    sort(a + 1, a + k + 1);
    bitset<N> f;
    rep (j, 1, k) {
      bitset<N> g;
      int l = a[j - 1] + 1, r = a[j];
      rep (w, l, r) g |= s[w];
      f ^= g;
    }
    ans += f.count();
    rep (j, 1, k) s[a[j]].set(i);
  }
  cout << ans << '\n';
}