#include <iostream>
#include <fstream>
#include<algorithm>
using namespace std;
ifstream fin("elmaj.in");
ofstream fout("elmaj.out");

int v[1000002],n,i,x,nr;

int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>v[i];
    }
    sort(v+1,v+n+1);
    x=v[n/2];
    nr=0;
    for(i=1;i<=n;i++)
    {
        if(x==v[i]) nr++;
    }
    if(nr>=n/2+1) fout<<x<<" "<<nr;
    else fout<<"-1";
    fin.close();
    fout.close();
    return 0;
}