#include <fstream>
#include <map>

using namespace std;

ifstream fin("elmaj.in");
ofstream fout("elmaj.out");

int N,x;
map<int,int> M;

int main()
{
 fin>>N;
  for(int i=0; i<N; ++i)
  {
     fin>>x;
     M[x]++;
  }

  for(map<int,int> :: iterator it=M.begin(); it!=M.end(); it++){
    if(it->second>=N/2+1){ fout<<it->first<<" "<< it->second; x=0;}
    else if(it->second < (N/2+1) && x!=0) x=-1;
  }
    if(x==-1) fout<<x;
return 0;
}