#include
int main()
{int i,n,x,s=1;
scanf("%d",&n);
for(i=0;i { scanf("%d",&x); if(x%2)s*=x; } printf("%d\n",s); getch(); return 0; }
program ji;
var
x,n,i:integer;
ji:longint;
begin
readln(n);
s:=1;
for i:=1 to n do
begin
read(x);
if (x mod 2 <>0) then
s:=s*x;
end;
write(s);
end.