#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
//FILE *f,*g;
ifstream f("elmaj.in");
ofstream g("elmaj.out");
int v[1000002];
int n,x,nr;
void read()
{
    f>>n;
    for(int i=1; i<=n; i++)
       f>>v[i];

}
void solve()
{
    sort(v+1,v+n+1);
    x=v[n/2];
    for(int i=n/2; x==v[i]; i++,nr++){}
    for(int i=n/2-1; x==v[i];i--,nr++){}
}
void write()
{
    if(nr>=n/2+1)
        g<<x<<" "<<nr;
    else
        g<<"-1";
}
int main()
{
    /*f=fopen("elmaj.in","r");
    g=fopen("elmaj.out","w");*/
    read();
    solve();
    write();
    /*fclose(f);
    fclose(g);*/
    return 0;
}