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  1. def f(s):
  2.     a=s.lstrip('[')
  3.     b,c,d=a.rstrip(']'),0,''
  4.     for e in b:d+=str('[<>,.-+]'.find(e));c+=(e=='[')-(e>'[')*(c>0)
  5.     return int('0'+d+(len(a)-len(b)-c)*'7',8)+1
  6.  
  7. def g(s):
  8.     a=s.strip('[')
  9.     b=a.rstrip(']')
  10.     c=d=0
  11.     for e in b:d=d*8+'[<>,.-+]'.find(e);c+=(e=='[')-(c>0!=e>'[')
  12.     return -~d*8**(len(a)-len(b)-c)
  13.  
  14. def enumerate(n):
  15.     if n==0: return ['']
  16.  
  17.     a=[]
  18.  
  19.     for c in '+-<>,.':
  20.         for x in enumerate(n-1):
  21.             a+=[c+x]
  22.  
  23.     for i in range(n-1):
  24.         for x in enumerate(i):
  25.             for y in enumerate(n-2-i):
  26.                 a+=['['+x+']'+y]
  27.  
  28.     return a
  29.  
  30. def verify():
  31.     i=1
  32.  
  33.     for n in range(7):
  34.         for x in enumerate(n):
  35.             if f(x)!=g(x):
  36.                 print i,f(x),g(x)
  37.                 1/0
  38.             i+=1
  39.         print 'n=%d done'%n
  40.  
  41.     print 'ok'
  42.  
  43. verify()
Success #stdin #stdout 1.47s 9120KB
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n=0 done
n=1 done
n=2 done
n=3 done
n=4 done
n=5 done
n=6 done
ok
https://ideone.com/oj3hal
language:
Python (cpython 2.7.16)
created:
8 years ago
visibility:
secret

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