n,k=map(int,input().split())
d=list(map(int,input().split()))
for i in range(n):
    d[i]-=1
c=0
for i in range(n):
    while d[i]!=i:
        j=d[i]
        d[i],d[j]=d[j],d[i]
        c+=1
if k>=c and (k-c)%2==0:
    print('YES')
else:
    print('NO')