-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathLeetCode_151_0041.py
More file actions
72 lines (65 loc) · 1.82 KB
/
LeetCode_151_0041.py
File metadata and controls
72 lines (65 loc) · 1.82 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
# 给定一个字符串,逐个翻转字符串中的每个单词。
#
#
#
# 示例 1:
#
# 输入: "the sky is blue"
# 输出: "blue is sky the"
#
#
# 示例 2:
#
# 输入: " hello world! "
# 输出: "world! hello"
# 解释: 输入字符串可以在前面或者后面包含多余的空格,但是反转后的字符不能包括。
#
#
# 示例 3:
#
# 输入: "a good example"
# 输出: "example good a"
# 解释: 如果两个单词间有多余的空格,将反转后单词间的空格减少到只含一个。
#
#
#
#
# 说明:
#
#
# 无空格字符构成一个单词。
# 输入字符串可以在前面或者后面包含多余的空格,但是反转后的字符不能包括。
# 如果两个单词间有多余的空格,将反转后单词间的空格减少到只含一个。
#
#
#
#
# 进阶:
#
# 请选用 C 语言的用户尝试使用 O(1) 额外空间复杂度的原地解法。
# Related Topics 字符串
# leetcode submit region begin(Prohibit modification and deletion)
class Solution:
def reverseWords(self, s: str) -> str:
s = list(s[::-1])
print(s)
n = len(s)
self.reverse_word(n, s)
s = self.clean_space(n, s)
return "".join(s)
def clean_space(self, n, s):
i, j = 0, 0
while j < n:
while j < n and s[j] == ' ': j += 1
while j < n and s[j] != ' ': s[i] = s[j]; i += 1;j += 1
while j < n and s[j] == ' ': j += 1
if j < n: s[i] = " "; i += 1
return s[:i]
def reverse_word(self, n, s):
i, j = 0, 0
while i < n:
while i < j or i < n and s[i] == ' ': i += 1
while j < i or j < n and s[j] != ' ': j += 1
s[i:j] = reversed(s[i:j])
# leetcode submit region end(Prohibit modification and deletion)
print(Solution().reverseWords("a good example"))