#include <fstream>
#include <algorithm>
using namespace std;
ifstream cin("elmaj.in");
ofstream cout("elmaj.out");
int n, v[100005], cnt;
int main()
{
    cin >> n;
    for(int i=1; i<=n; i++)
        cin >> v[i];
    sort(v+1, v+n+1);
    int k = v[n/2];
    for(int i=1; i<=n; i++)
        if(v[i] == k)
            cnt++;
    if(cnt >= n/2+1)
        cout << k << " " <<cnt;
    else
        cout << "-1";
    return 0;
}