from sys import stdin, stdout
input = lambda: stdin.readline().rstrip()
write = stdout.write

def main():
    N, K = map(int, input().split())
    D = tuple(map(int, input().split()))

    diff = 0
    for i, d in enumerate(D, start=1):
        if i != d:
            diff += 1

    ope = -(-diff // 2)
    if K >= ope and not (K - ope) % 2:
        write('YES\n')
    else:
        write('NO\n')

main()