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using namespace std;
#include <fstream>
ifstream fin("elmaj.in");
int main()
{
int i, n, a, val = 0, nr = 0, ok;
fin >> n;
for(; n; --n)
{
fin >> a;
if(a == val) ++nr;
else if(nr) --nr;
else val = a, nr = 1;
}
fin.close();
if(nr)
{
ifstream fin("elmaj.in");
fin >> n;
for(i = nr = 0; i < n; ++i)
{
fin >> a;
if(a == val) ++nr;
}
if(nr >= 1 + n / 2) ok = 1;
else ok = 0;
}
else ok = 0;
ofstream fout("elmaj.out");
if(!ok) fout << "-1\n";
else fout << val << ' ' << nr << '\n';
fout.close();
return 0;
}