import java.io.BufferedInputStream;
import java.util.*;

public class Main {
    public static void main(String[] argv){
        Scanner sc = new Scanner(new BufferedInputStream(System.in));
        TreeMap<Long,Integer> s = new TreeMap();
        int n = sc.nextInt();
        long[] a= new long[n];
        for(int i = 0 ; i < n ; i++){
            a[i] = sc.nextLong();
            s.put(a[i], s.getOrDefault(a[i], 0) + 1);
        }

        if ( n>1 && n % 2 == 1) {
            System.out.println(1);
        } else {
            int t = 0;
            int tot = n;
           while(tot>1){
               if (t % 2 ==0) {
                   Map.Entry<Long, Integer> x = s.pollFirstEntry();
                   long key1 = x.getKey();
                   int val1 = x.getValue() - 1;
                   tot--;
                   if (val1 == 0 ) s.remove(key1);
                   else s.put(key1, val1);

                   Map.Entry<Long, Integer> y = s.pollFirstEntry();
                   long key2 = y.getKey();
                   int val2 = y.getValue() - 1;
                   tot--;
                   if(val2==0) s.remove(key2);
                   else s.put(key2, val2);
                   tot++;
                   s.put(key1*key2, s.getOrDefault(key1*key2, 0 )+ 1);

               }else{
                   Map.Entry<Long, Integer> x = s.pollLastEntry();
                   long key1 = x.getKey();
                   int val1 = x.getValue() - 1;
                   tot--;
                   if (val1 == 0) s.remove(key1);
                   else s.put(key1, val1);

                   Map.Entry<Long, Integer> y = s.pollLastEntry();
                   long key2 = y.getKey();
                   int val2 = y.getValue() - 1;
                   tot--;
                   if(val2 == 0) s.remove(key2);
                   else   s.put(key2, val2);
                   tot++;
                   s.put(1L, s.getOrDefault(1L, 0 )+ 1);
               }
               t^=1;
           }
           System.out.println(s.firstKey());
        }
    }
}