n,k,*d=$<.read.split.map &:to_i
i,z=0,[]
n.times{
  m=i+1
  next(i=m)if d[i]==m
  j=d.index m
  next(i=j+1)if z[j]==0
  z[i]=0
  i=j
}
c=z.count 0
puts c<=k&&(k-c)&1==0 ? :YES : :NO