#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

ifstream cin("elmaj.in");
ofstream cout("elmaj.out");

int n;
vector <int> a;

main()
{
    cin >> n;
    a.resize(n);
    for(int i=0; i<n; i++)
    {
        cin  >> a[i];
    }
    sort(a.begin(),a.end());
    int s=0,x=a[n/2];
    for (int i=0; i<a.size(); i++)
    {
        if (a[i]==x) s++;
        if (a[i]>x) break;
    }
    if (s>(n/2)) cout << x << ' ' << s ; else cout << -1;
}