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"title": "Longest Substring of One Repeating Character",
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"content": "<p>You are given a <strong>0-indexed</strong> string <code>s</code>. You are also given a <strong>0-indexed</strong> string <code>queryCharacters</code> of length <code>k</code> and a <strong>0-indexed</strong> array of integer <strong>indices</strong> <code>queryIndices</code> of length <code>k</code>, both of which are used to describe <code>k</code> queries.</p>\n\n<p>The <code>i<sup>th</sup></code> query updates the character in <code>s</code> at index <code>queryIndices[i]</code> to the character <code>queryCharacters[i]</code>.</p>\n\n<p>Return <em>an array</em> <code>lengths</code> <em>of length </em><code>k</code><em> where</em> <code>lengths[i]</code> <em>is the <strong>length</strong> of the <strong>longest substring</strong> of </em><code>s</code><em> consisting of <strong>only one repeating</strong> character <strong>after</strong> the</em> <code>i<sup>th</sup></code> <em>query</em><em> is performed.</em></p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "babacc", queryCharacters = "bcb", queryIndices = [1,3,3]\n<strong>Output:</strong> [3,3,4]\n<strong>Explanation:</strong> \n- 1<sup>st</sup> query updates s = "<u>b<strong>b</strong>b</u>acc". The longest substring consisting of one repeating character is "bbb" with length 3.\n- 2<sup>nd</sup> query updates s = "bbb<u><strong>c</strong>cc</u>". \n The longest substring consisting of one repeating character can be "bbb" or "ccc" with length 3.\n- 3<sup>rd</sup> query updates s = "<u>bbb<strong>b</strong></u>cc". The longest substring consisting of one repeating character is "bbbb" with length 4.\nThus, we return [3,3,4].\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "abyzz", queryCharacters = "aa", queryIndices = [2,1]\n<strong>Output:</strong> [2,3]\n<strong>Explanation:</strong>\n- 1<sup>st</sup> query updates s = "ab<strong>a</strong><u>zz</u>". The longest substring consisting of one repeating character is "zz" with length 2.\n- 2<sup>nd</sup> query updates s = "<u>a<strong>a</strong>a</u>zz". The longest substring consisting of one repeating character is "aaa" with length 3.\nThus, we return [2,3].\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 10<sup>5</sup></code></li>\n\t<li><code>s</code> consists of lowercase English letters.</li>\n\t<li><code>k == queryCharacters.length == queryIndices.length</code></li>\n\t<li><code>1 <= k <= 10<sup>5</sup></code></li>\n\t<li><code>queryCharacters</code> consists of lowercase English letters.</li>\n\t<li><code>0 <= queryIndices[i] < s.length</code></li>\n</ul>\n",
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"lang": "C++",
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"code": "class Solution {\npublic:\n vector<int> longestRepeating(string s, string queryCharacters, vector<int>& queryIndices) {\n \n }\n};",
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"lang": "Java",
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"code": "class Solution {\n public int[] longestRepeating(String s, String queryCharacters, int[] queryIndices) {\n \n }\n}",
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"lang": "Python",
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"code": "class Solution(object):\n def longestRepeating(self, s, queryCharacters, queryIndices):\n \"\"\"\n :type s: str\n :type queryCharacters: str\n :type queryIndices: List[int]\n :rtype: List[int]\n \"\"\"\n ",
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"code": "class Solution:\n def longestRepeating(self, s: str, queryCharacters: str, queryIndices: List[int]) -> List[int]:\n ",
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"lang": "C",
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"code": "\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* longestRepeating(char * s, char * queryCharacters, int* queryIndices, int queryIndicesSize, int* returnSize){\n\n}",
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"code": "public class Solution {\n public int[] LongestRepeating(string s, string queryCharacters, int[] queryIndices) {\n \n }\n}",
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"lang": "JavaScript",
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"code": "/**\n * @param {string} s\n * @param {string} queryCharacters\n * @param {number[]} queryIndices\n * @return {number[]}\n */\nvar longestRepeating = function(s, queryCharacters, queryIndices) {\n \n};",
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"code": "# @param {String} s\n# @param {String} query_characters\n# @param {Integer[]} query_indices\n# @return {Integer[]}\ndef longest_repeating(s, query_characters, query_indices)\n \nend",
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"lang": "Swift",
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"code": "class Solution {\n func longestRepeating(_ s: String, _ queryCharacters: String, _ queryIndices: [Int]) -> [Int] {\n \n }\n}",
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"lang": "Go",
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"code": "func longestRepeating(s string, queryCharacters string, queryIndices []int) []int {\n \n}",
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"code": "object Solution {\n def longestRepeating(s: String, queryCharacters: String, queryIndices: Array[Int]): Array[Int] = {\n \n }\n}",
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"lang": "Kotlin",
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"code": "class Solution {\n fun longestRepeating(s: String, queryCharacters: String, queryIndices: IntArray): IntArray {\n \n }\n}",
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"lang": "Rust",
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"code": "impl Solution {\n pub fn longest_repeating(s: String, query_characters: String, query_indices: Vec<i32>) -> Vec<i32> {\n \n }\n}",
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"lang": "PHP",
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"code": "class Solution {\n\n /**\n * @param String $s\n * @param String $queryCharacters\n * @param Integer[] $queryIndices\n * @return Integer[]\n */\n function longestRepeating($s, $queryCharacters, $queryIndices) {\n \n }\n}",
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"lang": "TypeScript",
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"code": "function longestRepeating(s: string, queryCharacters: string, queryIndices: number[]): number[] {\n\n};",
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"lang": "Racket",
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"code": "(define/contract (longest-repeating s queryCharacters queryIndices)\n (-> string? string? (listof exact-integer?) (listof exact-integer?))\n\n )",
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"lang": "Erlang",
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"code": "-spec longest_repeating(S :: unicode:unicode_binary(), QueryCharacters :: unicode:unicode_binary(), QueryIndices :: [integer()]) -> [integer()].\nlongest_repeating(S, QueryCharacters, QueryIndices) ->\n .",
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"lang": "Elixir",
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"code": "defmodule Solution do\n @spec longest_repeating(s :: String.t, query_characters :: String.t, query_indices :: [integer]) :: [integer]\n def longest_repeating(s, query_characters, query_indices) do\n\n end\nend",
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"hints": [
"Use a segment tree to perform fast point updates and range queries.",
"We need each segment tree node to store the length of the longest substring of that segment consisting of only 1 repeating character.",
"We will also have each segment tree node store the leftmost and rightmost character of the segment, the max length of a prefix substring consisting of only 1 repeating character, and the max length of a suffix substring consisting of only 1 repeating character.",
"Use this information to properly merge the two segment tree nodes together."
],
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"sampleTestCase": "\"babacc\"\n\"bcb\"\n[1,3,3]",
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