mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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180 lines
16 KiB
JSON
180 lines
16 KiB
JSON
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"title": "Minimum String Length After Removing Substrings",
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"content": "<p>You are given a string <code>s</code> consisting only of <strong>uppercase</strong> English letters.</p>\n\n<p>You can apply some operations to this string where, in one operation, you can remove <strong>any</strong> occurrence of one of the substrings <code>"AB"</code> or <code>"CD"</code> from <code>s</code>.</p>\n\n<p>Return <em>the <strong>minimum</strong> possible length of the resulting string that you can obtain</em>.</p>\n\n<p><strong>Note</strong> that the string concatenates after removing the substring and could produce new <code>"AB"</code> or <code>"CD"</code> substrings.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "ABFCACDB"\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> We can do the following operations:\n- Remove the substring "<u>AB</u>FCACDB", so s = "FCACDB".\n- Remove the substring "FCA<u>CD</u>B", so s = "FCAB".\n- Remove the substring "FC<u>AB</u>", so s = "FC".\nSo the resulting length of the string is 2.\nIt can be shown that it is the minimum length that we can obtain.</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "ACBBD"\n<strong>Output:</strong> 5\n<strong>Explanation:</strong> We cannot do any operations on the string so the length remains the same.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 100</code></li>\n\t<li><code>s</code> consists only of uppercase English letters.</li>\n</ul>\n",
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"difficulty": "Easy",
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"exampleTestcases": "\"ABFCACDB\"\n\"ACBBD\"",
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"lang": "Erlang",
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"code": "-spec min_length(S :: unicode:unicode_binary()) -> integer().\nmin_length(S) ->\n .",
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"code": "defmodule Solution do\n @spec min_length(s :: String.t) :: integer\n def min_length(s) do\n\n end\nend",
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"hints": [
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"Can we use brute force to solve the problem?",
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"Repeatedly traverse the string to find and remove the substrings “AB” and “CD” until no more occurrences exist."
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],
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"solution": null,
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"sampleTestCase": "\"ABFCACDB\"",
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