BlcDragon Var a,k:integer;
begin
 assign (input, 'input.txt'); reset (input);
 assign (output, 'output.txt'); rewrite (output);
 k:=0; while (not Eof(input)) do
 begin
  readln(input,a);
  if ((a mod 2=0) and (a mod 10<>0))
  then
   k:= k+1; 
 end;
 writeln(output,k);
end.