#include <cstdio>
#include <algorithm>
using namespace std;
FILE*f=fopen("elmaj.in","r");
FILE*g=fopen("elmaj.out","w");
int v[1000010];
int main()
{
    int n,i,elmaj,lo,hi;
    fscanf(f,"%d",&n);
    for(int i=1;i<=n;++i)
        fscanf(f,"%d",&v[i]);
    sort(v+1,v+n+1);
    elmaj=v[n/2+1];
    for(i=n/2+1;v[i]==elmaj;--i);
        lo=i+1;
    for(i=n/2+1;v[i]==elmaj;++i);
        hi=i-1;
    if(hi-lo+1>=n/2+1)
        fprintf(g,"%d %d\n",elmaj,hi-lo+1);
    else
        fprintf(g,"-1");
    return 0;
}