21 lines
564 B
Python
21 lines
564 B
Python
import fileinput
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# originally, return len(a) - len(b) if positive, 0 otherwise.
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# Observing that longer is used for its Boolean result,
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# and that '' is False, while any other string is True,
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# longer need only to return a after removing len(b) characters,
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# which is done without resorting to len().
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def longer(a, b):
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while a and b:
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a, b = a[1:], b[1:]
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return a
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longest, lines = '', ''
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for x in fileinput.input():
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if longer(x, longest):
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lines, longest = x, x
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elif not longer(longest, x):
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lines += x
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print(lines, end='')
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