杭电2006

import java.awt.List;
import java.io.BufferedInputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main{
public static void main(String[] args) {
Scanner s = new Scanner(new BufferedInputStream(System.in));
while(s.hasNext()) {
int count=s.nextInt();
int num,sum=1;
for (int i = 0; i < count; i++) {
num=s.nextInt();
if (num%2!=0) {
sum*=num;
}

}
System.err.printf("%d",sum);
System.err.println();
}
}

}