#include <bits/stdc++.h>

using namespace std;

int v[1000005];

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