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  1. def chain_add(seq, end):
  2.     for i in range(end - len(seq)):
  3.         seq += chr(48+(ord(seq[i])+ord(seq[i+1]))%32%10)
  4.     return seq
  5.  
  6. def sequent(seq):
  7.     res = [0]*len(seq);seq=list(seq)
  8.     for z in range(len(seq)):
  9.         b = min(range(len(seq)),key=lambda i:seq[i])
  10.         res[b] = z
  11.         seq[b] = "~"
  12.     return res
  13.  
  14. def transpose(text, keys):
  15.     columns = ['']*len(keys)
  16.     for t in range(len(text)):
  17.         columns[t%len(keys)] += text[t]
  18.     res = [0]*len(keys)
  19.     for index in range(len(keys)):
  20.         res[keys[index]] = columns[index]
  21.     return''.join(res)
  22.  
  23. def untranspose(text, keys, disrupt=False):
  24.     columns = []
  25.     for j in range(len(keys)):
  26.         columns += [[]]
  27.     num_rows, len_last = divmod(len(text),len(keys))
  28.     num_rows += 1
  29.     if len_last == 0:
  30.         len_last = len(keys)
  31.     text_index = 0
  32.     for j in range(len(keys)):
  33.         ind = keys.index(j)
  34.         columns[ind] += list(text[text_index:text_index+num_rows-(ind>=len_last)])
  35.         text_index += num_rows-(ind>=len_last)
  36.     rows = []
  37.     for k in range(num_rows):
  38.         rows += [[]]
  39.         for j in columns:
  40.             rows[k] += j[k:k+1]
  41.     if disrupt:
  42.         undisrupt = []
  43.         current_row = 0
  44.         stop_key = 0
  45.         stop_index = keys.index(stop_key)
  46.         while current_row < num_rows:
  47.             undisrupt += rows[current_row][:stop_index]
  48.             rows[current_row] = rows[current_row][stop_index:]
  49.             stop_index += 1
  50.             current_row += 1
  51.             if stop_index > len(keys):
  52.                 stop_key = (stop_key + 1) % len(keys)
  53.                 stop_index = keys.index(stop_key)
  54.         for i in rows:
  55.             undisrupt += i
  56.         return ''.join(undisrupt)
  57.     else:
  58.         return ''.join(''.join(i) for i in rows)
  59.  
  60. def uncheckerboard(message, seq, word):
  61.     trans = {seq[-2:]:".", seq[-1]*2:"#"};x=64;res='';j=z=0
  62.     while x<90:
  63.         x += 1
  64.         v = chr(x)
  65.         if v in word:
  66.             trans[seq[word.index(v)]] = v
  67.         else:
  68.             trans[seq[z-2] + seq[j]] = v
  69.             j += z
  70.             z = (z+1) % 2
  71.     num = False
  72.     end = -1
  73.     h = ''
  74.     for j in range(len(message)):
  75.         if end>=0 and j<end+2:
  76.             continue
  77.         else:
  78.             end = -1
  79.         if num:
  80.             end = message.index(seq[-1]*2,j+1)
  81.             res += message[j:end]+"#"
  82.             num = 0
  83.         else:
  84.             k = message[j]
  85.             if h:
  86.                 res += trans[h+k]
  87.                 if trans[h+k] == "#":
  88.                     num = 1
  89.                 h = ''
  90.             elif k in seq[:-2]:
  91.                 res += trans[k]
  92.             else:
  93.                 h = k
  94.     begin = res.index("..") + 2
  95.     return res[begin:] + res[:begin]
  96.  
  97. def decode(message, keyword, phrase, date, agent):
  98.     mkey = -int(date[-1])
  99.     message = message.split()
  100.     m_id = message[mkey]
  101.     message = ''.join(message[:mkey] + message[mkey+1:])
  102.  
  103.     s1 = sequent(phrase[:10])
  104.     s2 = sequent(phrase[10:20])
  105.     b = ''.join(str((int(m_id[i])-int(date[i]))%10) for i in range(5))
  106.     a = chain_add(b, 10)
  107.     g = ''.join(str((int(a[i])+int(s1[i]))%10) for i in range(10))
  108.     t = ''.join(str(s2[int(g[i])]) for i in range(10))
  109.     u = chain_add(t,60)[10:]
  110.     p = agent+int(u[-2])
  111.     q = agent+int(u[-1])
  112.     seqT = sequent(t)
  113.     v = transpose(u,seqT)
  114.     k1 = sequent(v[:p])
  115.     k2 = sequent(v[p:p+q])
  116.     c = ''.join(str(i)for i in sequent(u[40:]))
  117.     z = untranspose(message,k2,1)
  118.     y = untranspose(z,k1)
  119.     x = uncheckerboard(y,c,keyword)
  120.     return x
  121.  
  122. print(decode("47642 81712 53404 93122 46041 91626 16481 62272 29202 40665 00520 24222 44459 91848 22524 81583 45414 47921 31439 09454 11145 29696 36485",
  123. "SENATORI",
  124. "THEFIRSTPRINCIPLEISTHATYOUMUSTNOTFOOLYOURSELFANDYOUARETHEEASIESTPERSONTOFOOL",
  125. "3172016",
  126. 9))
  127.  
Runtime error #stdin #stdout #stderr 0.01s 9992KB
comments (?)
stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last):
  File "./prog.py", line 126, in <module>
  File "./prog.py", line 119, in decode
  File "./prog.py", line 94, in uncheckerboard
ValueError: substring not found
https://ideone.com/TTzsRb
language:
Python 3 (python  3.9.5)
created:
7 years ago
visibility:
public

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