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UnderstatedGenerousManatee

Python 2.7

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  • main.py
main.py
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def longest_common_substring(s1, s2):
  m = [[0] * (1 + len(s2)) for i in xrange(1 + len(s1))]
  longest, x_longest = 0, 0
  for x in xrange(1, 1 + len(s1)):
    for y in xrange(1, 1 + len(s2)):
      if s1[x - 1] == s2[y - 1]:
        m[x][y] = m[x - 1][y - 1] + 1
        if m[x][y] > longest:
          longest = m[x][y]
          x_longest = x
      else:
        m[x][y] = 0
  return s1[x_longest - longest: x_longest]

def longest_common_sentence(s1, s2):
    s1_words = s1.split(' ')
    s2_words = s2.split(' ')  
    return ' '.join(longest_common_substring(s1_words, s2_words))


s1 = 'this is a foo bar sentence .'
s2 = 'what a kappa foo bar black sheep ?'
common_sentence = longest_common_sentence(s1, s2)
print common_sentence
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