HDU2006

#include
using namespace std;
int main()
{
int total=1,n;
while(cin>>n)
{
total=1;
int *p=new int[n];
int *d=p;
for(int i=0;i<n;i++,p++)
{

	cin>>*p;
	if(*p%2==1)
	{
	total*=(*p);   
	} 
}
	cout<<total<<endl;
	delete[] d;
} 

}