#include <iostream>
#include <fstream>
using namespace std;
int n,i,v[1000004],ap,nr;
int main()
{
    ifstream f("elmaj.in");
    ofstream g("elmaj.out");
    f>>n;nr=-1;ap=0;
    for(i=0;i<n;i++)
    {
        f>>v[i];
        if(ap==0) {nr=v[i];ap=1;continue;}
        if(v[i]==v[i-1]) {ap++;continue;}
        if(v[i]!=v[i-1]) ap--;
    }
    if(ap>0)
    {
        ap=0;
        for(i=0;i<n;i++)
            if(v[i]==nr) ap++;
        if(ap>=(n/2+1)) g<<nr<<" "<<ap;
        else g<<-1;
    }
    else g<<-1;
}