14 lines
356 B
Python
14 lines
356 B
Python
from itertools import groupby
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from re import sub
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def decode(string):
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return sub(r'(\d+)(\D)', lambda m: m.group(2) * int(m.group(1)), string)
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def encode(string):
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def single_helper(k, g):
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size = len(list(g))
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return k if size == 1 else str(size) + k
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return ''.join(single_helper(key, group) for key, group in groupby(string))
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