题目
给定一个字符串 s ,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: s = "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: s = "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: s = "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。
- 示例 4:
输入: s = ""
输出: 0
- 提示:
0 <= s.length <= 5 * 104
s 由英文字母、数字、符号和空格组成
解题
滑动窗口算法
- 提交代码
class Solution:
def lengthOfLongestSubstring(self, s: str) -> int:
left = 0
right = 0
window = []
max = 0
while right < len(s):
window.append(s[right])
right+=1
#print("right: " + str(right) + "\tleft: " + str(left))
#print(window)
if (max < len(window)):
max = len(window)
while(right < len(s) and s[right] in window and left < right):
window.remove(window[0])
left += 1
return max
- 本地测试代码
class Solution:
def lengthOfLongestSubstring(self, s: str) -> int:
left = 0
right = 0
window = []
max = 0
while right < len(s):
window.append(s[right])
right+=1
# print("right: " + str(right) + "\tleft: " + str(left))
print(window)
if (max < len(window)):
max = len(window)
while(right < len(s) and s[right] in window and left < right):
window.remove(window[0])
left += 1
return max
S = Solution()
length = S.lengthOfLongestSubstring("abcdda")
print("#########################")
print(length)