mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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174 lines
15 KiB
JSON
174 lines
15 KiB
JSON
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"questionId": "1715",
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"title": "Split a String Into the Max Number of Unique Substrings",
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"content": "<p>Given a string <code>s</code><var>,</var> return <em>the maximum number of unique substrings that the given string can be split into</em>.</p>\n\n<p>You can split string <code>s</code> into any list of <strong>non-empty substrings</strong>, where the concatenation of the substrings forms the original string. However, you must split the substrings such that all of them are <strong>unique</strong>.</p>\n\n<p>A <strong>substring</strong> is a contiguous sequence of characters within a string.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "ababccc"\n<strong>Output:</strong> 5\n<strong>Explanation</strong>: One way to split maximally is ['a', 'b', 'ab', 'c', 'cc']. Splitting like ['a', 'b', 'a', 'b', 'c', 'cc'] is not valid as you have 'a' and 'b' multiple times.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "aba"\n<strong>Output:</strong> 2\n<strong>Explanation</strong>: One way to split maximally is ['a', 'ba'].\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "aa"\n<strong>Output:</strong> 1\n<strong>Explanation</strong>: It is impossible to split the string any further.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>\n\t<p><code>1 <= s.length <= 16</code></p>\n\t</li>\n\t<li>\n\t<p><code>s</code> contains only lower case English letters.</p>\n\t</li>\n</ul>\n",
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"difficulty": "Medium",
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"exampleTestcases": "\"ababccc\"\n\"aba\"\n\"aa\"",
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"code": "class Solution {\npublic:\n int maxUniqueSplit(string s) {\n \n }\n};",
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"lang": "Erlang",
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"code": "-spec max_unique_split(S :: unicode:unicode_binary()) -> integer().\nmax_unique_split(S) ->\n .",
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"hints": [
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"Use a set to keep track of which substrings have been used already",
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"Try each possible substring at every position and backtrack if a complete split is not possible"
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],
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"sampleTestCase": "\"ababccc\"",
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"envInfo": "{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 17 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level two optimization (<code>-O2</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\"], \"java\": [\"Java\", \"<p><code> OpenJDK 17 </code>. 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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