N, K = map(int, input().split())

D = list(map(lambda x: int(x) - 1, input().split()))

ans = 0
for i in range(N):
    if D[i] != i:
        D[D[i]] = D[i]
        ans += 1
if ans > K or (ans - K) % 2:
    print('NO')
else:
    print('YES')