#yuki_482

n,k=map(int,raw_input().split())
d=map(int,raw_input().split())
for i in xrange(n):
 d[i]=d[i]-1
cnt=0
for i in xrange(n):
 if d[i]!=i:
  temp=d.index(i)
  d[i],d[temp]=d[temp],d[i]
  cnt+=1
if k>=cnt and k%2==cnt%2:
 print 'YES'
else:
 print 'NO'