mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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179 lines
16 KiB
JSON
179 lines
16 KiB
JSON
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"questionId": "71",
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"title": "Simplify Path",
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"content": "<p>Given a string <code>path</code>, which is an <strong>absolute path</strong> (starting with a slash <code>'/'</code>) to a file or directory in a Unix-style file system, convert it to the simplified <strong>canonical path</strong>.</p>\n\n<p>In a Unix-style file system, a period <code>'.'</code> refers to the current directory, a double period <code>'..'</code> refers to the directory up a level, and any multiple consecutive slashes (i.e. <code>'//'</code>) are treated as a single slash <code>'/'</code>. For this problem, any other format of periods such as <code>'...'</code> are treated as file/directory names.</p>\n\n<p>The <strong>canonical path</strong> should have the following format:</p>\n\n<ul>\n\t<li>The path starts with a single slash <code>'/'</code>.</li>\n\t<li>Any two directories are separated by a single slash <code>'/'</code>.</li>\n\t<li>The path does not end with a trailing <code>'/'</code>.</li>\n\t<li>The path only contains the directories on the path from the root directory to the target file or directory (i.e., no period <code>'.'</code> or double period <code>'..'</code>)</li>\n</ul>\n\n<p>Return <em>the simplified <strong>canonical path</strong></em>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> path = "/home/"\n<strong>Output:</strong> "/home"\n<strong>Explanation:</strong> Note that there is no trailing slash after the last directory name.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> path = "/../"\n<strong>Output:</strong> "/"\n<strong>Explanation:</strong> Going one level up from the root directory is a no-op, as the root level is the highest level you can go.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> path = "/home//foo/"\n<strong>Output:</strong> "/home/foo"\n<strong>Explanation:</strong> In the canonical path, multiple consecutive slashes are replaced by a single one.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= path.length <= 3000</code></li>\n\t<li><code>path</code> consists of English letters, digits, period <code>'.'</code>, slash <code>'/'</code> or <code>'_'</code>.</li>\n\t<li><code>path</code> is a valid absolute Unix path.</li>\n</ul>\n",
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"difficulty": "Medium",
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"exampleTestcases": "\"/home/\"\n\"/../\"\n\"/home//foo/\"",
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"categoryTitle": "Algorithms",
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"name": "String",
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"code": "class Solution(object):\n def simplifyPath(self, path):\n \"\"\"\n :type path: str\n :rtype: str\n \"\"\"\n ",
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"lang": "Erlang",
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"langSlug": "erlang",
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"code": "-spec simplify_path(Path :: unicode:unicode_binary()) -> unicode:unicode_binary().\nsimplify_path(Path) ->\n .",
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"langSlug": "elixir",
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"code": "defmodule Solution do\n @spec simplify_path(path :: String.t) :: String.t\n def simplify_path(path) do\n\n end\nend",
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"sampleTestCase": "\"/home/\"",
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Java 8 features such as lambda expressions and stream API can be used. </p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n<p>Includes <code>Pair</code> class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.</p>\"], \"python\": [\"Python\", \"<p><code>Python 2.7.12</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/2/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/2/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/2/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. 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