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#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,k;
    cin>>k>>n;
    vector<vector<int>>v(k),ss(k);
    v[0]=vector<int>(n+1,0);
    ss[0]=vector<int>(n+1,0);
    vector<int>nn={n};
    for(int i=1; i<k; i++)
    {
        cin>>n;
        nn.push_back(n);
        v[i]=vector<int>(n+1,0);
        ss[i]=vector<int>(n+1,0);
        for(int j=1; j<=n; j++)
            cin>>v[i][j];
    }
    int res=0;
    int fre=0;
    for(int i=k-1; i>=0; i--)
    {
        n=nn[i];
        int pot=0;
        for(int j=1; j<=n; j++)
        {
            if(ss[i][j]==0)
            {
                if(fre)
                {
                    ss[i][j]=1;
                    fre--;
                }
                else
                {
                    ss[i][j]=1;
                    res++;
                }
            }
            if(v[i][j]==0)
                pot+=ss[i][j];
            else
                ss[i-1][v[i][j]]+=ss[i][j];
        }
        fre+=pot;
    }
    cout<<res<<"\n";
}