#include <fstream>
#include <queue>
using namespace std;
ifstream f("interclasari.in");
ofstream g("interclasari.out");
priority_queue <int> Q;
int vect[1000005];
int main()
{
    int k,sol=0,n,x,m=0;
    f>>k;
    for(int i=1;i<=k;i++)
    {
        f>>n;
        sol+=n;
        for(int j=1;j<=n;j++)
        {
            f>>x;
            Q.push(x);
        }

    }
    g<<sol<<"\n";
    while(!Q.empty())
    {
        vect[++m]=Q.top();
        Q.pop();
    }
    for(int i=sol;i>=1;i--)
        g<<vect[i]<<" ";
    return 0;
}