2018护网杯线上 apm233

from base64 import b64decode,b64encode

def ():
    a1 = [4, -1, 6, -1, 3, 2, 4, 1, 3, -1, 5, 1, 2, -1, 5, 1, 3, -2, 7, 0, 2, 3, 5, 0, 5, 0, 5, 2, 1, -2, 6, -1, 3, 3, 4, 0, 5, -1, 6, 0, 4, 0, 7, 0, 5, -2, 7, 2, 2, -1, 6, 2, 2, 1, 5, 0, 2, 0, 3, 0, 4, 0, 6, -1, 5, 0, 5, 3, 0, 5, 3, 2]
    a2 = [2, 2, 3, 3, 3, -2, 7, 1, 1, 1, 5, 1, 0, 2, 5, 1, 0, 0, 4, 0, 7, 2, 2, 0, 4, 1, 3, 4, 0, 1, 6, -1, 5, -1, 3, 5, 1, 2, 5, 0, 5, 0, 2, 5, 1, 1, 5, 2, 2, 1, 2, 3, 5, -1, 4, 1, 2, -1, 7, 1, 2, 2, 1, 2, 5, 0, 5, 0, 5, -1, 3, 2]
    a3 = [3, -1, 6, -1, 5, 0, 4, 0, 2, 5, 0, 5, 1, -1, 5, 1, 0, 2, 4, 0, 5, 0, 4, 0, 6, -1, 6, 1, 2, 1, 3, 3, 2, 3, 3, 0, 5, -1, 4, 0, 6, 0, 5, 0, 5, 1, 2, 2, 3, 0, 5, 5, 0, 0, 6, 2, -1, 1, 5, 1, 0, 3, 4, -1, 4, 5, 0, 2, 5, 1, 4, 1]

    pos1 = 0
    pos2 = 0
    pos3 = 0
    pos4 = 0
    choice = []
    for i in range(len(a1)):
        pos1 += a1[i]
        pos2 += a2[i]
        pos3 += a3[i]
        if (pos4 + 4 != pos1) and (pos4 + 4 != pos2) and (pos4 + 4 != pos3):
            t = 4
        elif (pos4 + 3 != pos1) and (pos4 + 3 != pos2) and (pos4 + 3 != pos3):
            t = 3
        elif (pos4 + 2 != pos1) and (pos4 + 2 != pos2) and (pos4 + 2 != pos3):
            t = 2
        else:
            t = 1
        pos4 += t
        choice.append(t-1)

    print choice

    b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'

    print choice
    ans = ''
    for i in xrange(0,len(choice),3):
        t = (choice[i]<<4) + (choice[i+1]<<2) + choice[i+2]
        print t,
        ans+=b64[t]

    print 

    print ans
    print b64decode(ans)


level2()    # efbe3323adde6666feca1313beba1414
# level3 0acb7935481efc12
level4()    # 21d03c42f365901cff