摘要：
原题 1 class Solution: 2 def lengthOfLongestSubstring(self, s: str) -> int: 3 ans = left = 0 4 dic = {} 5 for i,c in enumerate(s): 6 if c in dic: 7 left 阅读全文
摘要：
原题 1 class Solution: 2 def pivotIndex(self, nums: List[int]) -> int: 3 s = sum(nums) 4 left = 0 5 for i,num in enumerate(nums): 6 if 2 * left == s - n 阅读全文