mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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173 lines
18 KiB
JSON
173 lines
18 KiB
JSON
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"title": "Count Substrings That Satisfy K-Constraint I",
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"content": "<p>You are given a <strong>binary</strong> string <code>s</code> and an integer <code>k</code>.</p>\n\n<p>A <strong>binary string</strong> satisfies the <strong>k-constraint</strong> if <strong>either</strong> of the following conditions holds:</p>\n\n<ul>\n\t<li>The number of <code>0</code>'s in the string is at most <code>k</code>.</li>\n\t<li>The number of <code>1</code>'s in the string is at most <code>k</code>.</li>\n</ul>\n\n<p>Return an integer denoting the number of <span data-keyword=\"substring-nonempty\">substrings</span> of <code>s</code> that satisfy the <strong>k-constraint</strong>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = "10101", k = 1</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">12</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>Every substring of <code>s</code> except the substrings <code>"1010"</code>, <code>"10101"</code>, and <code>"0101"</code> satisfies the k-constraint.</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = "1010101", k = 2</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">25</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>Every substring of <code>s</code> except the substrings with a length greater than 5 satisfies the k-constraint.</p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = "11111", k = 1</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">15</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p>All substrings of <code>s</code> satisfy the k-constraint.</p>\n</div>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 50 </code></li>\n\t<li><code>1 <= k <= s.length</code></li>\n\t<li><code>s[i]</code> is either <code>'0'</code> or <code>'1'</code>.</li>\n</ul>\n",
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"difficulty": "Easy",
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"exampleTestcases": "\"10101\"\n1\n\"1010101\"\n2\n\"11111\"\n1",
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"code": "class Solution {\npublic:\n int countKConstraintSubstrings(string s, int k) {\n \n }\n};",
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"code": "class Solution(object):\n def countKConstraintSubstrings(self, s, k):\n \"\"\"\n :type s: str\n :type k: int\n :rtype: int\n \"\"\"\n ",
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"code": "/**\n * @param {string} s\n * @param {number} k\n * @return {number}\n */\nvar countKConstraintSubstrings = function(s, k) {\n \n};",
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"code": "function countKConstraintSubstrings(s: string, k: number): number {\n \n};",
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"lang": "PHP",
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"code": "class Solution {\n\n /**\n * @param String $s\n * @param Integer $k\n * @return Integer\n */\n function countKConstraintSubstrings($s, $k) {\n \n }\n}",
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"langSlug": "swift",
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"code": "class Solution {\n func countKConstraintSubstrings(_ s: String, _ k: Int) -> Int {\n \n }\n}",
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"lang": "Kotlin",
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"code": "class Solution {\n fun countKConstraintSubstrings(s: String, k: Int): Int {\n \n }\n}",
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"lang": "Dart",
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"langSlug": "ruby",
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"code": "# @param {String} s\n# @param {Integer} k\n# @return {Integer}\ndef count_k_constraint_substrings(s, k)\n \nend",
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"lang": "Scala",
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"langSlug": "scala",
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"code": "object Solution {\n def countKConstraintSubstrings(s: String, k: Int): Int = {\n \n }\n}",
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"langSlug": "rust",
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"code": "impl Solution {\n pub fn count_k_constraint_substrings(s: String, k: i32) -> i32 {\n \n }\n}",
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"code": "-spec count_k_constraint_substrings(S :: unicode:unicode_binary(), K :: integer()) -> integer().\ncount_k_constraint_substrings(S, K) ->\n .",
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"code": "defmodule Solution do\n @spec count_k_constraint_substrings(s :: String.t, k :: integer) :: integer\n def count_k_constraint_substrings(s, k) do\n \n end\nend",
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"hints": [
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"Using a brute force approach, check each index until a substring satisfying the k-constraint is found, then increment."
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"sampleTestCase": "\"10101\"\n1",
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"envInfo": "{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 17 </code> using the latest C++ 23 standard, and <code>libstdc++</code> provided by GCC 13.</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 21</code>. Using compile arguments: <code>--enable-preview --release 21</code></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>. If you need more libraries, you can import it yourself.</p>\\r\\n\\r\\n<p>For Map/TreeMap data structure, you may use <a href=\\\"http://www.grantjenks.com/docs/sortedcontainers/\\\" target=\\\"_blank\\\">sortedcontainers</a> library.</p>\\r\\n\\r\\n<p>Note that Python 2.7 <a href=\\\"https://www.python.org/dev/peps/pep-0373/\\\" target=\\\"_blank\\\">will not be maintained past 2020</a>. For the latest Python, please choose Python3 instead.</p>\"], \"c\": [\"C\", \"<p>Compiled with <code>gcc 13</code> using the gnu11 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level one 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>\\r\\n\\r\\n<p>For hash table operations, you may use <a href=\\\"https://troydhanson.github.io/uthash/\\\" target=\\\"_blank\\\">uthash</a>. \\\"uthash.h\\\" is included by default. Below are some examples:</p>\\r\\n\\r\\n<p><b>1. Adding an item to a hash.</b>\\r\\n<pre>\\r\\nstruct hash_entry {\\r\\n int id; /* we'll use this field as the key */\\r\\n char name[10];\\r\\n UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>2. Looking up an item in a hash:</b>\\r\\n<pre>\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>3. Deleting an item in a hash:</b>\\r\\n<pre>\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n</pre>\\r\\n</p>\"], \"csharp\": [\"C#\", \"<p><a href=\\\"https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-12\\\" target=\\\"_blank\\\">C# 12</a> with .NET 8 runtime</p>\"], \"javascript\": [\"JavaScript\", \"<p><code>Node.js 20.10.0</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use 5.4.0 version of <a href=\\\"https://github.com/datastructures-js/priority-queue/blob/v5/README.md\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and 4.2.3 version of <a href=\\\
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