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#include <iostream>
#include <fstream>
using namespace std;
int n,i,v[1000004],ap,nr;
int main()
{
ifstream f("elmaj.in");
ofstream g("elmaj.out");
f>>n>>v[0];nr=v[0];ap=1;
for(i=1;i<n;i++)
{
f>>v[i];
if(v[i]==v[i-1]) {ap++;continue;}
if(v[i]!=v[i-1]) ap--;
if(ap==0)
{
nr=v[i];
ap=1;
}
}
if(ap>0)
{
ap=0;
for(i=0;i<n;i++)
if(v[i]==nr) ap++;
if(ap>=(n/2)+1) g<<nr<<" "<<ap;
else g<<-1;
}
else g<<-1;
}