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

cnt = 0
for i in range(N):
    x = lst[i]
    if x!=i:
        lst[i] = lst[x]
        lst[x] = x
        cnt+=1
print("NO" if cnt>K or (K-cnt)%2 else "YES")