n,k = map(int, raw_input().split())
l = map(int, raw_input().split())
for i,j in enumerate(l):
    if j == i+1:
        continue
    p = j
    while p != i+1:
        t = l[p-1]
        l[p-1] = p
        p = t
        k -= 1
    l[i] = p
if k >= 0 and k % 2 == 0:
    print 'YES'
else:
    print 'NO'