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

cnt = 0
for i in range(N):
    if D[i] != i+1:
        cnt += 1

if cnt % 2 == 0:
    cnt //= 2
else:
    cnt -= 1
    
if cnt > K:    
    print('NO')
elif (K-cnt) % 2 == 1:
    print('NO')
else:
    print('YES')