#include <iostream>
#include <fstream>
ifstream f("elmaj.in");
ofstream g("elmaj.out");
using namespace std;
int main()
{    int n,i,v[100],nr,m,nr1;

    f>>n;nr1=0;
    for(i=1;i<=n;i++)
        f>>v[i];
    nr=1;
    for(i=1;i<=n;i++)
    {m=v[1];
        if(v[i]==m)
            nr++;
        else
            nr--;
        if(nr<0)
        {nr=1;m=v[i];}}
    for(i=1;i<=n;i++)
        if(v[i]==m)
            nr1++;
    if(nr1==n/2+1)
        g<<m<<" "<<nr1;
    else
        g<<"-1";
    return 0;
}