#include <fstream>
using namespace std;
ifstream f("elmaj.in");
ofstream g("elmaj.out");
int nr=0,n,i,a[100000],k,cand;
int main()
{
    f>>n;
    for(i=1;i<=n;i++) f>>a[i];
    k=0;
    for(i=1;i<=n;i++)
    {
        if(k==0) {k=1;cand=a[i];}
        else if(a[i]==cand)k++;
        else k--;
    }
    for(i=1;i<=n;i++) if(a[i]==cand) nr++;
    if(nr>=n/2+1) {g<<cand;g<<endl;g<<nr;} else g<<-1;

}