const
n=5;
var
i,p:integer;
a:array[1..n] of integer;
begin
for i:=1 to n do
begin
a[i]:=random(20);
write(' ',a[i]:3);
end;
writeln();
writeln('-------');
p:=1;
for i:=1 to n do
if i mod 2=0 then p:=p*a[i];
writeln('Proizvedenie= ',p);
end.