N,K = map(int,input().split())
D = list(map(int,input().split()))
cnt = 0
for i in range(N):
	if D[i] != i+1:
		cnt+=1
def check():
	ma,mi = 0,0
	mi = cnt // 2
	if cnt % 2 == 1:
		mi+=1
	ma = max(0,cnt - 1)

	if mi <= K and mi % 2 == K % 2:
		return True
	if ma <= K and ma % 2 == K % 2:
		return True
	return False

if check():
	print('YES')
else:
	print('NO')