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

count = 0
i = 0
while i < N:
    if D[i] != i + 1:
        j = D[i]
        D[i],D[j-1] = D[j-1],D[i]
        count += 1
    else:
        i += 1
if count <= K and (K-count)%2 == 0:
    print('YES')
else:
    print('NO')