n, k = gets.chomp.split(" ").map(&:to_i)
d = gets.chomp.split(" ").map { |a| a.to_i - 1 }

minimum = 0
d.each_with_index do |cur_val, expected|
  next if cur_val == expected

  minimum += 1
  d[d.index(expected)] = cur_val
  d[expected] = expected
end

puts (minimum <= k && (k - minimum) % 2 == 0) ? "YES" : "NO"