n, k = map(int, raw_input().split())
a = map(int, raw_input().split())

ct = 0

for i in range(len(a)):
    if i != a[i] - 1:
        ct += 1

if ct / 2 == k:
    print "YES"
elif ct == 0 and k % 2 == 0:
    print "YES"
elif ct / 2 < k and (k - (ct / 2)) % 2 == 0:
    print "YES"
else:
    print "NO"