mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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156 lines
16 KiB
JSON
156 lines
16 KiB
JSON
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"questionId": "1525",
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"title": "Queries on a Permutation With Key",
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"content": "<p>Given the array <code>queries</code> of positive integers between <code>1</code> and <code>m</code>, you have to process all <code>queries[i]</code> (from <code>i=0</code> to <code>i=queries.length-1</code>) according to the following rules:</p>\r\n\r\n<ul>\r\n\t<li>In the beginning, you have the permutation <code>P=[1,2,3,...,m]</code>.</li>\r\n\t<li>For the current <code>i</code>, find the position of <code>queries[i]</code> in the permutation <code>P</code> (<strong>indexing from 0</strong>) and then move this at the beginning of the permutation <code>P.</code> Notice that the position of <code>queries[i]</code> in <code>P</code> is the result for <code>queries[i]</code>.</li>\r\n</ul>\r\n\r\n<p>Return an array containing the result for the given <code>queries</code>.</p>\r\n\r\n<p> </p>\r\n<p><strong>Example 1:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> queries = [3,1,2,1], m = 5\r\n<strong>Output:</strong> [2,1,2,1] \r\n<strong>Explanation:</strong> The queries are processed as follow: \r\nFor i=0: queries[i]=3, P=[1,2,3,4,5], position of 3 in P is <strong>2</strong>, then we move 3 to the beginning of P resulting in P=[3,1,2,4,5]. \r\nFor i=1: queries[i]=1, P=[3,1,2,4,5], position of 1 in P is <strong>1</strong>, then we move 1 to the beginning of P resulting in P=[1,3,2,4,5]. \r\nFor i=2: queries[i]=2, P=[1,3,2,4,5], position of 2 in P is <strong>2</strong>, then we move 2 to the beginning of P resulting in P=[2,1,3,4,5]. \r\nFor i=3: queries[i]=1, P=[2,1,3,4,5], position of 1 in P is <strong>1</strong>, then we move 1 to the beginning of P resulting in P=[1,2,3,4,5]. \r\nTherefore, the array containing the result is [2,1,2,1]. \r\n</pre>\r\n\r\n<p><strong>Example 2:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> queries = [4,1,2,2], m = 4\r\n<strong>Output:</strong> [3,1,2,0]\r\n</pre>\r\n\r\n<p><strong>Example 3:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> queries = [7,5,5,8,3], m = 8\r\n<strong>Output:</strong> [6,5,0,7,5]\r\n</pre>\r\n\r\n<p> </p>\r\n<p><strong>Constraints:</strong></p>\r\n\r\n<ul>\r\n\t<li><code>1 <= m <= 10^3</code></li>\r\n\t<li><code>1 <= queries.length <= m</code></li>\r\n\t<li><code>1 <= queries[i] <= m</code></li>\r\n</ul>",
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"code": "class Solution(object):\n def processQueries(self, queries, m):\n \"\"\"\n :type queries: List[int]\n :type m: int\n :rtype: List[int]\n \"\"\"\n ",
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"code": "\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* processQueries(int* queries, int queriesSize, int m, int* returnSize){\n\n}",
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"code": "impl Solution {\n pub fn process_queries(queries: Vec<i32>, m: i32) -> Vec<i32> {\n \n }\n}",
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"code": "class Solution {\n\n /**\n * @param Integer[] $queries\n * @param Integer $m\n * @return Integer[]\n */\n function processQueries($queries, $m) {\n \n }\n}",
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"hints": [
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"Create the permutation P=[1,2,...,m], it could be a list for example.",
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"For each i, find the position of queries[i] with a simple scan over P and then move this to the beginning."
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