alias LL = Int64
macro chmin(x, y); {{x}} = {{y}} if {{x}} > {{y}}; end
macro chmax(x, y); {{x}} = {{y}} if {{x}} < {{y}}; end
macro yn(x); {{x}} ? "Yes" : "No"; end

# ---------------------------------------------------- :)

n, m = read_line.split.map(&.to_i64)
a = read_line.split.map(&.to_i64.% m)
amax = a.max
at = a.tally
b = at.to_a.sort_by!{|e| -e[1]}

at.size.times do |i|
  num, cnt = b[i]
  next at[0] = 1 if num == 0
  next if at[num] == 0

  j = m - num
  while j <= amax
    if at[j]?
      at[j] = 0
    end
    j += m
  end
end

puts at.values.sum