N, K = map(int, input().split())
D = [0]
D.extend(list(map(int, input().split())))
for i in range(1, N+1):
    while D[i] != i:
        temp = D[i]
        D[i], D[temp] = D[temp], D[i]
        K -= 1
    if K < 0:
        break
if K & 1 == 1 or K < 0:
    print('NO')
else:
    print('YES')