var n,i,one,dec,sum:integer;
begin
  writeln('Введите n'); readln(n);
  sum:=0;
  for i:=10 to 99 do begin
      one:= i mod 10; dec:=i div 10;
      if (one<>n)and(dec<>n) then sum:=sum+i;
  end;
  writeln(sum);
  readln
end.