#include<cstdio>
#include<algorithm>
using namespace std;
FILE *f=fopen("elmaj.in","r");
FILE *g=fopen("elmaj.out","w");
int n,v[1000001],i,x,nr;
int main()
{
    fscanf(f,"%d",&n);
    for(i=1;i<=n;i++)
        fscanf(f,"%d",&v[i]);
    sort(v+1,v+n+1);
    i=n/2;
    x=v[n/2];
    while(v[++i]==x)nr++;
    while(v[--i]==x)nr++;
    nr-=2;
    if(nr>n/2)fprintf(g,"%d %d",x,nr);
    else fprintf(g,"-1");
    return 0;
}