N,K = map(int,input().split())
lsD = list(map(lambda x:int(x)-1,input().split()))
# ループ見つける
used = [False]*(N)
loops = []
for i in range(N):
    if used[i]:
        continue
    cnt = 0
    now = i
    while used[now] == False:
        used[now] = True
        cnt += 1
        now = lsD[now]
    loops.append(cnt-1)

aa = K-sum(loops)
if aa < 0:
    print('NO')
elif aa % 2 == 0:
    print('YES')
else:
    print('NO')