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"title": "Substring XOR Queries",
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"content": "<p>You are given a <strong>binary string</strong> <code>s</code>, and a <strong>2D</strong> integer array <code>queries</code> where <code>queries[i] = [first<sub>i</sub>, second<sub>i</sub>]</code>.</p>\n\n<p>For the <code>i<sup>th</sup></code> query, find the <strong>shortest substring</strong> of <code>s</code> whose <strong>decimal value</strong>, <code>val</code>, yields <code>second<sub>i</sub></code> when <strong>bitwise XORed</strong> with <code>first<sub>i</sub></code>. In other words, <code>val ^ first<sub>i</sub> == second<sub>i</sub></code>.</p>\n\n<p>The answer to the <code>i<sup>th</sup></code> query is the endpoints (<strong>0-indexed</strong>) of the substring <code>[left<sub>i</sub>, right<sub>i</sub>]</code> or <code>[-1, -1]</code> if no such substring exists. If there are multiple answers, choose the one with the <strong>minimum</strong> <code>left<sub>i</sub></code>.</p>\n\n<p><em>Return an array</em> <code>ans</code> <em>where</em> <code>ans[i] = [left<sub>i</sub>, right<sub>i</sub>]</code> <em>is the answer to the</em> <code>i<sup>th</sup></code> <em>query.</em></p>\n\n<p>A <strong>substring</strong> is a contiguous non-empty sequence of characters within a string.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "101101", queries = [[0,5],[1,2]]\n<strong>Output:</strong> [[0,2],[2,3]]\n<strong>Explanation:</strong> For the first query the substring in range <code>[0,2]</code> is <strong>"101"</strong> which has a decimal value of <strong><code>5</code></strong>, and <strong><code>5 ^ 0 = 5</code></strong>, hence the answer to the first query is <code>[0,2]</code>. In the second query, the substring in range <code>[2,3]</code> is <strong>"11",</strong> and has a decimal value of <strong>3</strong>, and <strong>3<code> ^ 1 = 2</code></strong>. So, <code>[2,3]</code> is returned for the second query. \n\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "0101", queries = [[12,8]]\n<strong>Output:</strong> [[-1,-1]]\n<strong>Explanation:</strong> In this example there is no substring that answers the query, hence <code>[-1,-1] is returned</code>.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = "1", queries = [[4,5]]\n<strong>Output:</strong> [[0,0]]\n<strong>Explanation:</strong> For this example, the substring in range <code>[0,0]</code> has a decimal value of <strong><code>1</code></strong>, and <strong><code>1 ^ 4 = 5</code></strong>. So, the answer is <code>[0,0]</code>.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 10<sup>4</sup></code></li>\n\t<li><code>s[i]</code> is either <code>'0'</code> or <code>'1'</code>.</li>\n\t<li><code>1 <= queries.length <= 10<sup>5</sup></code></li>\n\t<li><code>0 <= first<sub>i</sub>, second<sub>i</sub> <= 10<sup>9</sup></code></li>\n</ul>\n",
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"code": "class Solution {\npublic:\n vector<vector<int>> substringXorQueries(string s, vector<vector<int>>& queries) {\n \n }\n};",
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"code": "class Solution {\n public int[][] substringXorQueries(String s, int[][] queries) {\n \n }\n}",
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"code": "class Solution(object):\n def substringXorQueries(self, s, queries):\n \"\"\"\n :type s: str\n :type queries: List[List[int]]\n :rtype: List[List[int]]\n \"\"\"\n ",
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"code": "class Solution:\n def substringXorQueries(self, s: str, queries: List[List[int]]) -> List[List[int]]:\n ",
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"code": "/**\n * Return an array of arrays of size *returnSize.\n * The sizes of the arrays are returned as *returnColumnSizes array.\n * Note: Both returned array and *columnSizes array must be malloced, assume caller calls free().\n */\nint** substringXorQueries(char * s, int** queries, int queriesSize, int* queriesColSize, int* returnSize, int** returnColumnSizes){\n\n}",
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"code": "class Solution {\n\n /**\n * @param String $s\n * @param Integer[][] $queries\n * @return Integer[][]\n */\n function substringXorQueries($s, $queries) {\n \n }\n}",
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"code": "class Solution {\n func substringXorQueries(_ s: String, _ queries: [[Int]]) -> [[Int]] {\n \n }\n}",
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"lang": "Go",
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"code": "func substringXorQueries(s string, queries [][]int) [][]int {\n \n}",
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"lang": "Rust",
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"code": "impl Solution {\n pub fn substring_xor_queries(s: String, queries: Vec<Vec<i32>>) -> Vec<Vec<i32>> {\n \n }\n}",
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"lang": "Racket",
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"code": "(define/contract (substring-xor-queries s queries)\n (-> string? (listof (listof exact-integer?)) (listof (listof exact-integer?)))\n\n )",
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"lang": "Erlang",
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"code": "-spec substring_xor_queries(S :: unicode:unicode_binary(), Queries :: [[integer()]]) -> [[integer()]].\nsubstring_xor_queries(S, Queries) ->\n .",
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"code": "defmodule Solution do\n @spec substring_xor_queries(s :: String.t, queries :: [[integer]]) :: [[integer]]\n def substring_xor_queries(s, queries) do\n\n end\nend",
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"You do not need to consider substrings having lengths greater than 30.",
"Pre-process all substrings with lengths not greater than 30, and add the best endpoints to a dictionary."
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