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

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

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