n,k = map(int, input().split())
d = list(map(lambda x: int(x)-1, input().split()))

for i in range(n):
    while d[i] != i:
        k -= 1
        t = d[i]
        d[i], d[t] = d[t], t
if k>=0 and k%2 == 0:
    print('YES')
else:
    print('NO')