Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters.
This is case sensitive, for example "Aa" is not considered a palindrome here.
Note:
Assume the length of given string will not exceed 1,010.
Example:
Input: "abccccdd" Output: 7 Explanation: One longest palindrome that can be built is "dccaccd", whose length is 7.
from collections import Counter
class Solution(object):
def longestPalindrome(self, s):
"""
:type s: str
:rtype: int
"""
c=Counter(s)
if len(c)==1:
return len(s)
ans=0
flag=False
for i in c:
if not flag and c[i]%2==1:
flag=True
ans+=c[i]//2*2
if flag:
ans+=1
return ans
[LeetCode&Python] Problem 409. Longest Palindrome
原文：https://www.cnblogs.com/chiyeung/p/10074734.html