N,K=map(int,input().split())

D=[ x-1 for x in map(int,input().split())]

Z=[int(D[i]==i) for i in range(N)].count(0)
#print(Z)
swaptime=(Z+1)//2
#print(K-swaptime)
print(('YES','NO')[K-swaptime<0 or (K-swaptime)%2==1])