#include <fstream>
#include <algorithm>

using namespace std;

int v[1000001];
int main()
{
    int n,i,nr;
    ifstream fin("elmaj.in");
    ofstream fout("elmaj.out");
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>v[i];
    sort(v+1,v+n+1);
    nr=1;
    int a;
    for (i=2;i<=n;i++)
    {
       if (v[i]==v[i-1])
       {
            nr++;
            a=v[i];
       }
       else
       {
           if (nr>=n/2+1)
           {
                fout<<nr<<" "<<a;
                n=-1;
           }
           else
           {
               nr=1;
           }
       }
    }
    if (n!=-1)
        fout<<-1;
    return 0;
}