program vanopan;
uses crt;
var
  a, b: array[1..100000] of longint;
  n, k, l, r, mid, x, i : longint;

begin
  read(n, k);
  for i := 1 to n do
    read(a[i]);
  for i := 1 to k do
    read(b[i]);
  for i := 1 to k do
    begin
      l := 1;
      r := n + 1;
      x := b[i];
      while r - l > 1 do
        begin
          mid := (r + l)div 2;
          if a[mid] > x then
            r := mid
          else
            l := mid;
        end;
      if a[l] = x then
        writeln('YES')
      else
        writeln('NO');
    end;
end.