type vek=array[1..100000] of longint;
var v,x:vek; f:text; n,i,j,k,max:longint;
procedure maxx(a:longint);
  var i:longint;t:boolean;
  begin
    t:=false; i:=a-1;
    while (i<n)and not t do begin
    inc(i);
     if (x[i]=x[a]-1)and(v[i]>v[a]) then begin t:=true;
     write(f,v[i],' ');
     if x[i]>1 then
     maxx(i);
     end;
    end;
    end;
begin
  assign(f,'scmax.in');
  reset(f);
  readln(f,n);
  for i:=1 to n do
    read(f,v[i]);
  close(f);
  x[n]:=1;
  for i:=n-1 downto 1 do begin
    max:=x[i];
    for j:=i+1 to n do
      if (x[j]>max)and(v[j]>v[i]) then max:=x[j];
    x[i]:=max+1;  end;
    max:=0;
  for i:=1 to n do
    if x[i]>max then begin max:=x[i]; k:=i; end;
  assign(f,'scmax.out');
  rewrite(f);
  writeln(f,max);
  write(f,v[k],' ');
  maxx(k);
  close(f);
end.