var
a:array[1..100] of integer;
s,p1,p2,n,i:integer;
begin
readln(n);
for i:=1 to n do
read(a[i]);
p1:=1;
p2:=1;
for i:=1 to n do
if a[i] mod 2=0 then p1:=p1*a[i]
else p2:=p2*a[i];
s:=p1+p2;
writeln(s);
end.
var
a:array[1..100] of integer;
s,p1,p2,n,i:integer;
begin
readln(n);
for i:=1 to n do
read(a[i]);
p1:=1;
p2:=1;
for i:=1 to n do
if a[i] mod 2=0 then p1:=p1*a[i]
else p2:=p2*a[i];
s:=p1+p2;
writeln(s);
end.