n, k = gets.strip.split(' ').map(&:to_i)
d = gets.strip.split(' ').map(&:to_i)
count = 0
(1..n).each do |i|
	count += 1 if d[i - 1] != i
end
if k < count / 2
	puts "NO"
elsif k % 2 == (count / 2) % 2
	puts "YES"
else
	puts "NO"
end