1 #include<stdio.h>
 2 
 3 int main()
 4 {
 5     int i,s,n,x;
 6     while(~scanf("%d",&n))
 7     {
 8         for(i=0,s=1; i<n; ++i)
 9         {
10             scanf("%d",&x);
11             if(x%2)
12                 s*=x;
13         }
14             printf("%d\n",s);
15     }
16     return 0;
17 }