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Copy path97 - Interleaving String.py
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Copy path97 - Interleaving String.py
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50 lines (45 loc) · 1.7 KB
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class Solution:
# @return a boolean
def isInterleave(self, s1, s2, s3):
if len(s3) != len(s1) + len(s2):
return False
if not s1:
return s2 == s3
if not s2:
return s1 == s3
p = []
len1 = len(s1)
len2 = len(s2)
for i in range(len1 + 1):
p.append([False] * (len2+1))
p[0][0] = True
for i in range(len1+1):
for j in range(len2+1):
k = i+j
if i > 0 and s1[i-1] == s3[k-1]:
p[i][j] = p[i][j] or p[i-1][j]
if j > 0 and s2[j-1] == s3[k-1]:
p[i][j] = p[i][j] or p[i][j-1]
return p[len1][len2]
def isInterleave1(self, s1, s2, s3):
if len(s3) != len(s1) + len(s2):
return False
if not s1:
return s2 == s3
if not s2:
return s1 == s3
match = False
if s1[0] == s3[0]:
match = match or self.isInterleave(s1[1:], s2, s3[1:])
if s2[0] == s3[0]:
match = match or self.isInterleave(s1, s2[1:], s3[1:])
return match
if __name__ == '__main__':
solution = Solution()
# s1 = 'a'
# s2 = 'b'
# s3 = 'ab'
s1 = 'bbbbbabbbbabaababaaaabbababbaaabbabbaaabaaaaababbbababbbbbabbbbababbabaabababbbaabababababbbaaababaa'
s2 = 'babaaaabbababbbabbbbaabaabbaabbbbaabaaabaababaaaabaaabbaaabaaaabaabaabbbbbbbbbbbabaaabbababbabbabaab'
s3 = 'babbbabbbaaabbababbbbababaabbabaabaaabbbbabbbaaabbbaaaaabbbbaabbaaabababbaaaaaabababbababaababbababbbababbbbaaaabaabbabbaaaaabbabbaaaabbbaabaaabaababaababbaaabbbbbabbbbaabbabaabbbbabaaabbababbabbabbab'
print solution.isInterleave(s1, s2, s3)