const
n = 10;
var
i: 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('-------');
writeln('-------');
for i := 1 to n div 2 do
begin
write(a[i], ' ');
write(a[n - i + 1], ' ');
end;
if odd(n) then
write(a[n div 2 + 1]);
end.