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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("elmaj.in");
ofstream g("elmaj.out");
int n,i;
int v[1000001];
int main()
{
int elmaj,kpos;
f>>n;
f>>v[1];
int k;
elmaj=v[1];
k=1;
for(i=2;i<=n;i++)
{
f>>v[i];
if(k==0)
{
elmaj=v[i];
k=1;
}
else{
if(v[i]==elmaj)
k++;
else
k--;}
}
if(k>0)
{
k=0;
for(i=1;i<=n;i++)
if(v[i]==elmaj)
k++;
g<<elmaj<<' '<<k;
}
else
g<<"-1";
f.close();
g.close();
return 0;
}