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#include <iostream>
#include <vector>

using namespace std;

int main()
{
    int k;

    cin >> k;

    int* days = new int[k];
    vector<vector<int>> conf(k);
    vector<vector<int>> pers(k);

    int n;
    cin >> n;
	days[0] = n;
    conf[0].resize(n);
    pers[0].resize(n);
    for (int i = 0; i < n; i++) {
        conf[0][i] = 0;
	}


    for (int i = 1; i < k; i++) {
        cin >> n;
        days[i] = n;
        conf[i].resize(n);
        pers[i].resize(n);

        for (int j = 0; j < n; j++) {
            cin >> conf[i][j];
        }
    }

    /*
    for (int i = 0; i < k; i++) {
        cout << days[i] << " ";
        for (int j = 0; j < days[i]; j++) {
            cout << conf[i][j] << " ";
        }
        cout << endl;
    }
    cout << "=====" << endl;
    */

    for (int j = 0; j < days[k - 1]; j++) {
        pers[k - 1][j] = 0;
    }
    
    int sum = 0;
    int sumMax = 0;
    for (int i = k - 1; i > 0; i--) {
		sum = 0;
        for (int j = 0; j < days[i]; j++) {
            if (pers[i][j] == 0)
                pers[i][j] = 1;
			sum += pers[i][j];
        }
		if (sum > sumMax) sumMax = sum;
        for (int j = 0; j < days[i - 1]; j++) {
            pers[i - 1][j] = 0;
        }
        for (int j = 0; j < days[i]; j++) {
            if (conf[i][j] > 0)
                pers[i - 1][conf[i][j] - 1] += pers[i][j];
        }
    }
    sum = 0;
    for (int j = 0; j < days[0]; j++) {
        if (pers[0][j] == 0)
            pers[0][j] = 1;
        sum += pers[0][j];
    }
    if (sum > sumMax) sumMax = sum;

    /*
    for (int i = 0; i < k; i++) {
        cout << days[i] << " ";
        for (int j = 0; j < days[i]; j++) {
            cout << pers[i][j] << " ";
        }
        cout << endl;
    }
    cout << "=====" << endl;
    */
    cout << sumMax << endl;

}