#include <fstream>

using namespace std;
ifstream fin("elmaj.in");
ofstream fout("elmaj.out");
unsigned int v[1000005],n;

int main()
{
   fin>>n;
   int ct,i,x;
   fin>>v[1];
   ct=1;
   x=v[1];
   for(i=2;i<=n;++i)
     { fin>>v[i];
         if(x==v[i])
            ++ct;
         else --ct;
         if(ct<0)
         { ct=1;
             x=v[i];
         }
     }
    ct=0;
    for(i=1;i<=n;++i)
        if(v[i]==x)
        ++ct;
    if(ct==n/2+1)
        fout<<x<<" "<<ct;
    else fout<<"-1";
    return 0;
}