Uses crt;
Const
N = 5;
var
a:array[1..N] of integer;
i,j,k:integer;
begin
      for i:=1 to N do readln(a[i]);
      k:=1;
      for i:=1 to N do
      begin
            if(a[i] mod 2 <> 0) and (a[i] > 0) then
            begin
                  k:=k*a[i];
            end;
      end;

      writeln(k);


      readkey;
end.