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

D = [ x for x in map(int,input().split())]

num = 0
for i in range(len(D)):
    tmp = D[i]
    if tmp == i+1:
        continue
    else:
        D[i] = D[tmp-1]
        D[tmp-1] = tmp
        num += 1
diff = K - num
if diff >= 0 and diff % 2 == 0:
    print("YES")
else:
    print("NO")