52 lines
906 B
Python
52 lines
906 B
Python
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s = "bb"
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def longestPalindrome(s):
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def expandAroundCenter(s, l, r):
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while l>=0 and r<len(s) and s[l]==s[r]:
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l-=1
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r+=1
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return s[l+1:r]
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res = ""
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for i in range(len(s)):
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oddPalin = expandAroundCenter(s, i, i)
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evenPalin = expandAroundCenter(s, i, i+1)
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print(oddPalin, evenPalin)
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if len(oddPalin)>len(res):
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res = oddPalin
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if len(evenPalin)>len(res):
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res = evenPalin
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return res
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# start, end = 0,0
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# for i in range(len(s)):
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# len1 = expandAroundCenter(s, i, i)
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# len2 = expandAroundCenter(s, i, i+1)
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# print(len1, len2)
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# length = max(len1, len2)
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# if length > end-start:
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# start = i-(length-1)/2
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# end = i + length/2
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# return s[start:end+1]
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print(longestPalindrome(s))
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