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#include<fstream>
#include<algorithm>
using namespace std;
ifstream f("elmaj.in");
ofstream g("elmaj.out");
int n,j,i,a[1000002];
bool w=0;
int main()
{
f>>n;
for(i=1;i<=n;i++)
f>>a[i];
sort(a+1,a+n+1);
i=1;
while(i<=n && !w)
{
j=i+1;
while(a[i]==a[j]) j++;
if(j-i>n/2) w=1;
else i=j;
}
if(w)
g<<a[i]<<' '<<j-i<<'\n';
else g<<"-1\n";
g.close();
return 0;
}