1 #include<cstdio>
 2 using namespace std;
 3 int main()
 4 {
 5     int n;
 6 
 7     while(scanf("%d",&n)!=EOF)
 8     {
 9         int x;
10         long long result = 1;
11         while(n--)
12         {
13             scanf("%d",&x);
14             if(x%2 !=0)
15             {
16                 result *= x;
17             }
18         }
19         printf("%ld\n",result);
20     }
21     return 0;
22 }