n,k=map(int,input().split())
d=list(map(int,input().split()))
y=[0]*n
for i in range(n):
	d[i]-=1
	y[d[i]]=i
for i in range(n):
	if d[i]!=i:
		p1,p2=i,y[i]
		d[p1],d[p2]=d[p2],d[p1]
		y[d[p1]],y[d[p2]]=y[d[p2]],y[d[p1]]
		k-=1
print(["NO","YES"][k%2==0])