N,K = map(int,input().split())
D = list(map(int,input().split()))
cnt = 0
for i in range(N):
	if D[i] != i + 1:
		a,b = D[i]-1,D[D[i]-1]-1
		D[b],D[a] = D[a],D[b]
		cnt+=1
K -= cnt
if K >= 0 and K % 2 == 0:
	print('YES')
else:
	print('NO')