{ "data": { "question": { "questionId": "71", "questionFrontendId": "71", "categoryTitle": "Algorithms", "boundTopicId": 1218, "title": "Simplify Path", "titleSlug": "simplify-path", "content": "

Given a string path, which is an absolute path (starting with a slash '/') to a file or directory in a Unix-style file system, convert it to the simplified canonical path.

\n\n

In a Unix-style file system, a period '.' refers to the current directory, a double period '..' refers to the directory up a level, and any multiple consecutive slashes (i.e. '//') are treated as a single slash '/'. For this problem, any other format of periods such as '...' are treated as file/directory names.

\n\n

The canonical path should have the following format:

\n\n\n\n

Return the simplified canonical path.

\n\n

 

\n

Example 1:

\n\n
\nInput: path = "/home/"\nOutput: "/home"\nExplanation: Note that there is no trailing slash after the last directory name.\n
\n\n

Example 2:

\n\n
\nInput: path = "/../"\nOutput: "/"\nExplanation: Going one level up from the root directory is a no-op, as the root level is the highest level you can go.\n
\n\n

Example 3:

\n\n
\nInput: path = "/home//foo/"\nOutput: "/home/foo"\nExplanation: In the canonical path, multiple consecutive slashes are replaced by a single one.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "简化路径", "translatedContent": "

给你一个字符串 path ,表示指向某一文件或目录的 Unix 风格 绝对路径 (以 '/' 开头),请你将其转化为更加简洁的规范路径。

\n\n

在 Unix 风格的文件系统中,一个点(.)表示当前目录本身;此外,两个点 (..) 表示将目录切换到上一级(指向父目录);两者都可以是复杂相对路径的组成部分。任意多个连续的斜杠(即,'//')都被视为单个斜杠 '/' 。 对于此问题,任何其他格式的点(例如,'...')均被视为文件/目录名称。

\n\n

请注意,返回的 规范路径 必须遵循下述格式:

\n\n\n\n

返回简化后得到的 规范路径

\n\n

 

\n\n

示例 1:

\n\n
\n输入:path = \"/home/\"\n输出:\"/home\"\n解释:注意,最后一个目录名后面没有斜杠。 
\n\n

示例 2:

\n\n
\n输入:path = \"/../\"\n输出:\"/\"\n解释:从根目录向上一级是不可行的,因为根目录是你可以到达的最高级。\n
\n\n

示例 3:

\n\n
\n输入:path = \"/home//foo/\"\n输出:\"/home/foo\"\n解释:在规范路径中,多个连续斜杠需要用一个斜杠替换。\n
\n\n

示例 4:

\n\n
\n输入:path = \"/a/./b/../../c/\"\n输出:\"/c\"\n
\n\n

 

\n\n

提示:

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