| ¬ # bits % 8 ≠ 0, bits.first, # bits = m * 8 + n0, ((8 - n0) + # bits) % 8 = 0, n0 < 8, bits.first, # bits2bytes(bits) < n, # bits ≤ 8 * (n - 1), m < n ⊦ bits = [], mklist(i2b(~1), n - # bits2bytes(bits)) + bits2bytes(bits) = bits2bytes(mklist(true, (n - 1 - m) * 8)) + bits2bytes(mklist(true, 8 - n0) + bits), n * 8 = # bits, n0 = 0, mklist(true, 8 - n0) + bits = [], n - 1 - m = 0 |
((8 - n0) + # bits) % 8 = 0, # bits = m * 8 + n0, # bits % 8 = 0, m < n, # bits ≤ 8 * (n - 1), # bits2bytes(bits) < n, bits.first, n0 < 8 ⊦ n - 1 - m = 0, mklist(true, 8 - n0) + bits = [], n0 = 0, n * 8 = # bits, mklist(i2b(~1), n - # bits2bytes(bits)) + bits2bytes(bits) = bits2bytes(mklist(true, (n - 1 - m) * 8)) + bits2bytes(mklist(true, 8 - n0) + bits), bits = []