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

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

x=0
for i in range(N):
    if D[i]==i:continue
    j=D[i]
    D[i]=D[j]
    D[j]=j
    x+=1
    
print(('NO','YES')[K>=x and (K-x)%2==0])