n, k = gets.strip.split(' ').map(&:to_i)
d = gets.strip.split(' ').map(&:to_i)
count = 0
count2 = 0
(0...n).each do |i|
	next if d[i] - 1 == i
	if d[d[i] - 1] == i
		count += 1 
	else
		count2 += 1
	end
end

# p count
# p count2
if count2 == 0 && k % 2 == 0
	puts "YES"
elsif count2 == 0
	puts "NO"
elsif k - count / 2 - count2 + 1 >= 0 && (k - count / 2 - count2 + 1) % 2 == 0
	puts "YES"
else
	puts "NO"
end