#include <iostream>
#include <fstream>
using namespace std;
int v[1000005],n,i,k,j;
int main()
{
    ifstream f("elmaj.in");
    ofstream g("elmaj.out");
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>v[i];
        k=0;
        for (j=1;j<=n;j++)
        {
            if (v[i]==v[j]) k++;
            if (k>=n/2+1) g<<v[i]<<" "<<k;
        }
    }
    if (k<n/2+1) g<<-1;
    return 0;
}