N,K = map(int,input().split())
lst = [0]+list(map(int,input().split()))

cnt = 0
def change(i,x):
    global cnt
    lst[i] = lst[x]
    lst[x] = x
    cnt+=1
    if i!=lst[i]:
        change(i,lst[i])

for i in range(N+1):
    x = lst[i]
    if x!=i:
        change(i,x)

print("NO" if cnt>K or (K-cnt)%2 else "YES")