program Project2;

{$APPTYPE CONSOLE}

uses
  SysUtils;

Var N,k,J1,J2,J3:int64;
begin
assign(input,'count.in');
reset(input);
readln(N);
close(input);

assign(output,'count.out');
rewrite(output);

if (N>0) and (N<10) then k:=1;
if (N<100) and (N>10) then k:=2;
if (N mod 11=0) and (N<100) then k:=1;

While (N>100) and (N<1000) do begin

N:=(J1*(10*l)-10)+(J2*(10*(l-1))-10)+(J3*(10*(l-2))-10)+(J4*(10*(l-3))-10)+(J5*(10*(l-4))-10);



end;

close(output);
writeln(k);
  { TODO -oUser -cConsole Main : Insert code here }
end.