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

D = [ x-1 for x in map(int, input().split())]

cnt = 0

for n in range(N):
    while D[n] != n:
        t = D[n]
        D[n], D[t] = D[t], D[n]
        cnt += 1

print('NO' if K < cnt or (K-cnt)%2 else 'YES')