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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("elmaj.in");
ofstream fout ("elmaj.out");
int v[1000001];
int main()
{
int n,k=0,maxim=-1;
unsigned a;
fin>>n;
for (int i=0; i<n; i++)
{
fin>>a;
v[a]++;
}
for (int i=0; i<n; i++)
{
if (v[i]>maxim)
maxim=i;
}
if (maxim!=-1 && maxim > n/2)
for (int i=0; i<n; i++)
{
if (v[i]==v[maxim])
k++;
}
if (k==1)
fout<<maxim<<' '<<v[maxim];
else fout << -1;
return 0;
}