N,K = map(int, input().split())
D = [int(d) for d in input().split()]

done = [0]*N
cnt = 0
for i in range(N):
    j = i
    temp = 0
    while done[j-1] == 0:
        done[j-1] = 1
        j = D[j-1]
        temp += 1
    cnt += max(0, temp-1)

if cnt <= K and cnt%2 == K%2:
    print("YES")
else:
    print("NO")