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Cod sursa(job #950399)
#include <fstream>
#include <bitset>
using namespace std;
ifstream f("interclasari.in");
ofstream g("interclasari.out");
int k, n, sol=0, x;
bitset <20000000> v;
int main()
{
f>>k;
for (int aux=1; aux<=k; aux++)
{
f>>n; sol+=n;
for (int i=1; i<=n; i++)
{
f>>x; v[x]=1;
}
}
g<<sol<<'\n';
for (int i=0; i<sol; i++)
if (v[i]) g<<v[i]<<'\n';
f.close(); g.close();
return 0;
}