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June 2018 Update

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Ingy döt Net 2018-06-22 20:57:24 +00:00
parent ba8067c3b7
commit 22f33d4004
5278 changed files with 84726 additions and 14379 deletions
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0
Task/Balanced-brackets/Python/balanced-brackets.py → Task/Balanced-brackets/Python/balanced-brackets-1.py
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Task/Balanced-brackets/Python/balanced-brackets-2.py Normal file
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>>> from itertools import accumulate
>>> from random import shuffle
>>> def gen(n):
... txt = list('[]' * n)
... shuffle(txt)
... return ''.join(txt)
...
>>> def balanced(txt):
... brackets = ({'[': 1, ']': -1}.get(ch, 0) for ch in txt)
... return all(x>=0 for x in accumulate(brackets))
...
>>> for txt in (gen(N) for N in range(10)):
... print ("%-22r is%s balanced" % (txt, '' if balanced(txt) else ' not'))
...
'' is balanced
'][' is not balanced
'[]][' is not balanced
']][[[]' is not balanced
'][[][][]' is not balanced
'[[[][][]]]' is balanced
'][[[][][]][]' is not balanced
'][]][][[]][[][' is not balanced
'][[]]][][[]][[[]' is not balanced
'][[][[]]]][[[]][][' is not balanced

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Task/Balanced-brackets/Python/balanced-brackets-3.py Normal file
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>>> import numpy as np
>>> from random import shuffle
>>> def gen(n):
... txt = list('[]' * n)
... shuffle(txt)
... return ''.join(txt)
...
>>> m = np.array([{'[': 1, ']': -1}.get(chr(c), 0) for c in range(128)])
>>> def balanced(txt):
... a = np.array(txt, 'c').view(np.uint8)
... return np.all(m[a].cumsum() >= 0)
...
>>> for txt in (gen(N) for N in range(10)):
... print ("%-22r is%s balanced" % (txt, '' if balanced(txt) else ' not'))
...
'' is balanced
'][' is not balanced
'[[]]' is balanced
'[]][][' is not balanced
']][]][[[' is not balanced
'[[]][[][]]' is balanced
'[][[]][[]]][' is not balanced
'[][[[]][[]]][]' is balanced
'[[][][[]]][[[]]]' is balanced
'][]][][[]][]][][[[' is not balanced