#include<stdio.h>
#include<fstream>
#include<vector>
#include<queue>
using namespace std;

priority_queue<int> Q;
int N,K,a,NR;

int main()
{
	ifstream f("interclasari.in");
	ofstream g("interclasari.out");
	
	f >> K;
	for(int i=1;i<=K;i++)
	{
		f >> N;
		NR += N;
		for(int j=1;j<=N;j++)
		{
			f >> a;
			Q.push(-a);
		}
	}
	g << NR << "\n";
	for(;!Q.empty();Q.pop())
		g << -Q.top() << " ";
}