1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
#include "bits/stdc++.h"
using namespace std;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int k, n;
    cin >> k >> n;
    vector <vector <int>> v(k + 1), ile(k + 1);
    v[0].resize(n + 1, 0); 
    ile[0].resize(n + 1, 0);
    for (int i = 1; i < k; i++) {
        cin >> n;
        v[i].resize(n + 1);
        ile[i].resize(n + 1, 0);
        for (int j = 1; j <= n; j++) {
            cin >> v[i][j];
        }
    }

    for (int i = k - 1; i >= 0; i--) {
        for (int j = 1; j < v[i].size(); j++) {
            if (ile[i][j] == 0) ile[i][j] = 1;
            if (v[i][j] != 0) ile[i - 1][v[i][j]] += ile[i][j];
        }
    }

    int ans = 0;
    for (int i = 0; i < k; i++) {
        ans = max(ans, accumulate(ile[i].begin(), ile[i].end(), 0));
    }
    cout << ans << '\n';
}