program scccmax;
var l,p,a:array[1..100000] of longint;
    n:longint;
    rl,ri:longint;

 Procedure citire;
 var i:longint;
 begin
   assign(input,'scmax.in');reset(input);
   readln(n);
   for i:=0 to (n DIV 5)-1 do
        read(a[5*i+1],a[5*i+2],a[5*i+3],a[5*i+4],a[5*i+5]);
   for i:=5*(n div 5)+1 to  n do read(a[i]);
 end;


 Procedure dinamic;
 var i,j:longint;
 begin
   l[n]:=1;
   p[n]:=-1;
   for i:=n-1 downto 1 do
     begin
     l[i]:=1;
     p[i]:=-1;
     for j:=i+1 to n do
        if (a[i]<=a[j]) and (l[i]<1+l[j]) then
           begin
           l[i]:=1+l[j];
           p[i]:=j;
           if rl<l[i] then begin
             rl:=l[i];
             ri:=i;
             end;
           end;
     end;
 end;


 Procedure sol;
 var i:longint;
 begin
   assign(output,'scmax.out');rewrite(output);
   writeln(rl);
   while p[ri]>0 do
      begin
      write(a[ri],' ');
      ri:=p[ri];
      end;
   write(a[ri]);
 end;




 begin
 citire;
 dinamic;
 sol;
 close(input);
 close(output);
 end.