var n, k, a: integer;
f: boolean;
begin
  readln(n);
  f:=true;
  k:=0;
  while (f) and (k < n) do
  begin
    readln(a);
    if (a mod 2 = 0) then f:= false;
    k:= k+1;
  end;
  writeln(k)
end.