题目
Given a string s, the power of the string is the maximum length of a non-empty substring that contains only one unique character.
Return the power of the string.
解题思路
遍历字符串，如果当前字符串与之前的不同，则更新结果，否则计数器+1，也可以使用itertools.groupby
代码
class Solution:
def maxPower(self, s: str) -> int:
res = ct = 1
for i in range(1, len(s)):
if s[i] != s[i - 1]:
res = max(res, ct)
ct = 1
else:
ct += 1
return max(res, ct)
import itertools
class Solution:
def maxPower(self, s: str) -> int:
return max(len(list(b)) for a, b in itertools.groupby(s))
