from collections import defaultdict

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

comp = [-1] * N
cnt = 0
for i in range(N):
    if comp[i] != -1:
        continue
    cnt += 1
    j = i
    while comp[j] == -1:
        comp[j] = cnt
        j = D[j]-1

d = defaultdict(int)
for i in range(N):
    d[comp[i]] += 1

cnt = 0
for v in d.values():
    cnt += v-1

if cnt > K:
    print('NO')
elif (K-cnt) % 2 == 1:
    print('NO')
else:
    print('YES')