Reverse go binary.

• Gray code

Probset berasumsi peserta bisa ngereverse binary go sehingga tidak perlu dijelaskan di sini

Tiga bagian penting:

1. Fungsi sus hanya ngeshuffle posisi karakter. Reverse sus:

def revSus(s):
    v0 = s[len(s) / 2:][::-1]
    v1 = s[:len(s) / 2][::-1]
    return ''.join([i + j for i, j in zip(v0, v1)])

2. Gray code x xor (x >> 1). Reverse gray code tinggal pakai libnum.rev_grey_code.

3. RotateLeft64 -> RotateRight64.