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

done = [0] * (N + 1)
cnt = 0
for i in range(N):
    if D[i] == i + 1: continue
    if not done[D[i]] or not done[i + 1]:
        cnt += 1
        done[D[i]] = done[i + 1] = True
yes = cnt <= K and cnt % 2 == K % 2
print('YES' if yes else 'NO')