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// Karol Kosinski 2026
#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=(a),_b=(b);i<_b;++i)
#define FR_(i,a,b) for(int i=(a),_b=(b);i<=_b;++i)
#define FD_(i,b,a) for(int i=(b),_a=(a);i>=_a;--i)
#define ALL(c) (c).begin(),(c).end()
#define SIZE(c) int((c).size())
#define X first
#define Y second
#define endl '\n'
#define NAM(x) #x,'=',x
using namespace std;
using LL = long long;
using ULL = unsigned long long;
using PII = pair<int, int>;
using TIII = tuple<int, int, int>;
template<class...T> void _cout(T...a){(cout<<...<<a);}

#ifndef ENABLE_DEBUG
#define DEB(k,p,f,x...)
#else
#define DEB(k,p,f,x...) {if(k)_cout("------",setw(4),__LINE__," : ",__FUNCTION__,endl);if(p)f(x);}
#endif
#define DEBF(f,x...)    DEB(1,1,f,x)
#define DEBL            DEBF(void,0)
#define DEBC(p,x...)    DEB(0,p,_cout,x)
#define DEBUG(x...)     DEBC(1,x)

constexpr int NX = 500'005;

int P[NX], CA[NX], CB[NX];
vector<int> S;

int solve()
{
    int k, n0, counter = 0;
    cin >> k >> n0;
    FR_(i,1,n0) S.push_back(0);
    S.push_back(n0);
    FR_(d,2,k)
    {
        int n;
        cin >> n;
        FR_(i,1,n) cin >> P[i];
        FD_(i,n,1) S.push_back( P[i] );
        S.push_back(n);
    }
    int *A = CA, *B = CB;

    while ( not S.empty() )
    {
        int n = S.back(); S.pop_back();
        FR_(i,1,n)
        {
            P[i] = S.back(); S.pop_back();
            if ( A[i] == 0 )
            {
                A[i] = 1;
                if ( counter > 0 ) -- counter;
            }
        }
        FR_(i,1,n)
        {
            if ( P[i] == 0 )
            {
                counter += A[i];
            }
            else
            {
                B[ P[i] ] += A[i];
            }
            A[i] = 0;
        }
        swap( A, B );
    }
    return counter;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << solve() << endl;
    return 0;
}