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#include <fstream>
using namespace std;
ifstream in("elmaj.in");
ofstream out("elmaj.out");
int v[1000001];
int main()
{
int n,i,gg=0,s=0,pos;
in>>n;
for(i=1; i<=n; i++)
in>>v[i];
for(i=1; i<=n; i++)
{
if(gg==0)
{
pos=v[i];
gg++;
}
else
{
if(v[i]==pos)
gg++;
else
gg--;
}
}
for(i=1; i<=n; i++)
if(v[i]==pos)
s++;
if(s==n/2+1)
out<<pos<<" "<<s;
else
out<<"-1";
return 0;
}