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lengthOfLongestSubstring.py
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58 lines (48 loc) · 1.81 KB
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'''
@project : LeetCode
@File : lengthOfLongestSubstring
@Contact : 9824373@qq.com
@Desc :
给定一个字符串,请你找出其中不含有重复字符的 最长子串 的长度。
示例 1:
输入: "abcabcbb"
输出: 3
解释: 因为无重复字符的最长子串是 "abc",所以其长度为 3。
示例 2:
输入: "bbbbb"
输出: 1
解释: 因为无重复字符的最长子串是 "b",所以其长度为 1。
示例 3:
输入: "pwwkew"
输出: 3
解释: 因为无重复字符的最长子串是 "wke",所以其长度为 3。
请注意,你的答案必须是 子串 的长度,"pwke" 是一个子序列,不是子串。
来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/longest-substring-without-repeating-characters
@Modify Time @Author @Version @Desciption
------------ ------- -------- -----------
2020-02-24 zhan 1.0 None
'''
class Solution:
def lengthOfLongestSubstring(self, s: str) -> int:
if len(s) == 0:
return 0
bIdx, eIdx, ans = 0, 0, 0
curDict = {}
while eIdx < len(s):
if s[eIdx] not in curDict:
curDict[s[eIdx]] = eIdx
else:
for char in s[bIdx:curDict[s[eIdx]]]:
curDict.pop(char)
bIdx = curDict[s[eIdx]] + 1
curDict[s[eIdx]] = eIdx
ans = max(len(curDict), ans)
eIdx += 1
return ans
if __name__ == '__main__':
a = "abcabcbb"
# a = "pwwkew"
a = "因为DFDAF无重DF复DF字F为符"
ans = Solution().lengthOfLongestSubstring(a)
print(ans)