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#include <bits/stdc++.h>
using namespace std;
ifstream fin ("interclasari.in");
ofstream fout ("interclasari.out");
priority_queue <int> q;
int n, s, k;
int main()
{
int x;
fin >> k;
for (int i=1; i<=k; i++)
{
fin >> n;
s+=n;
for (int j=1; j<=n; j++)
{
fin >> x;
q.push(-x);
}
}
fout << s << "\n";
while (!q.empty())
{
fout << -q.top() << " ";
q.pop();
}
fin.close();
fout.close();
return 0;
}