from collections import defaultdict

N, K = map(int, input().split())
D = list(map(int, input().split()))
position = defaultdict(int)
cnt = 0

for i in range(N):
    position[D[i]] = i

for i in range(N):
    if D[i] == i + 1:
        continue
    D[position[i+1]] = D[i]
    position[D[i]] = position[i+1]
    D[i] = i + 1
    position[i+1] = i
    cnt += 1

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