program p2;
var a,b:array[1..100000]of integer;
    i,j,n,max,p:longint;
    f1,f2:text;

procedure citire;
 begin
  readln(f1,n);
   for i:=1 to n do
    read(f1,a[i]);
 end;

procedure notare;
 begin
  for i:=n-1 downto 1 do
   begin
    p:=i;
     for j:=i to n do
      if (a[j]>a[i])and(b[j]>b[p]) then
                                    p:=j;
    b[i]:=b[p]+1;
   end;
 end;

procedure cmax;
 begin
  for i:=1 to n do
   if max<b[i] then
                max:=b[i];
 end;

procedure afisare;
 begin
  writeln(f2,max);
  for i:=1 to n do
   if b[i]=max then
                begin
                 write(f2,a[i],' ');
                 dec(max);
                end;
 end;


begin
 assign(f1,'scmax.in'); reset(f1);
 assign(f2,'scmax.out'); rewrite(f2);

  citire;
  b[n]:=1;
  notare;
  cmax;
  afisare;

 close(f1); close(f2);
End.