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
# p count
if count % 2 == 1 && k % 2 == 0
	puts "YES"
elsif count % 2 == 0 && k % 2 == 1
	puts "YES"
elsif count == 0 && k % 2 == 0
	puts "YES"
else 
	puts "NO"
end