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#include <bits/stdc++.h>
using namespace std;
ifstream fin("interclasari.in");
ofstream fout("interclasari.out");
priority_queue <int> q;
int k, L, cnt, x;
int main()
{
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;
}