WhiteHat Contest 09 - Crypto300

def encrypt(byte):
    bit = bin(byte)[2:].rjust(8, '0')
    bit = [int(x) for x in bit]


    a = 1 - (bit[0] & bit[1])
    b = 1 - (bit[2] & bit[3])
    c = 1 - (bit[4] & bit[5])
    d = 1 - (bit[6] & bit[7])


    A = 1 - (bit[0] & bit[2])
    B = 1 - (bit[1] & bit[3])
    C = 1 - (bit[4] & bit[6])
    D = 1 - (bit[5] & bit[7])




    e = a ^ bit[1]
    f = b ^ bit[1]
    g = c ^ bit[2]
    h = d ^ bit[3]
    i = A ^ bit[4]
    j = B ^ bit[5]
    k = C ^ bit[6]
    l = D ^ bit[7]


    o = [0] * 8
    o[0] = e ^ bit[7]
    o[1] = f ^ bit[3]
    o[2] = g ^ bit[4]
    o[3] = h ^ bit[5]
    o[4] = i ^ bit[6]
    o[5] = j ^ bit[7]
    o[6] = k ^ bit[0]
    o[7] = l ^ bit[1]


    return int(''.join([str(x) for x in o]), 2)