#include <fstream>
#include <queue>

using namespace std;

ifstream fin ("interclasari.in");
ofstream fout("interclasari.out");

priority_queue <int> q;

int main()
{
    int k, L, x, cnt = 0;
    fin >> k;
    for(int i = 1; i <= k; ++i)
    {
        fin >> L;
        cnt += L;
        for(int j = 1; j <= L; ++j)
        {
            fin >> x;
            q.push(-x);
        }
    }
    fout << cnt << '\n';
    while(!q.empty())
    {
        fout << -q.top() << " ";
        q.pop();
    }
    return 0;
}