mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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174 lines
16 KiB
JSON
174 lines
16 KiB
JSON
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"questionId": "2312",
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"title": "Most Frequent Number Following Key In an Array",
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"content": "<p>You are given a <strong>0-indexed</strong> integer array <code>nums</code>.<strong> </strong>You are also given an integer <code>key</code>, which is present in <code>nums</code>.</p>\n\n<p>For every unique integer <code>target</code> in <code>nums</code>, <strong>count</strong> the number of times <code>target</code> immediately follows an occurrence of <code>key</code> in <code>nums</code>. In other words, count the number of indices <code>i</code> such that:</p>\n\n<ul>\n\t<li><code>0 <= i <= nums.length - 2</code>,</li>\n\t<li><code>nums[i] == key</code> and,</li>\n\t<li><code>nums[i + 1] == target</code>.</li>\n</ul>\n\n<p>Return <em>the </em><code>target</code><em> with the <strong>maximum</strong> count</em>. The test cases will be generated such that the <code>target</code> with maximum count is unique.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,100,200,1,100], key = 1\n<strong>Output:</strong> 100\n<strong>Explanation:</strong> For target = 100, there are 2 occurrences at indices 1 and 4 which follow an occurrence of key.\nNo other integers follow an occurrence of key, so we return 100.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2,2,2,2,3], key = 2\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> For target = 2, there are 3 occurrences at indices 1, 2, and 3 which follow an occurrence of key.\nFor target = 3, there is only one occurrence at index 4 which follows an occurrence of key.\ntarget = 2 has the maximum number of occurrences following an occurrence of key, so we return 2.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 <= nums.length <= 1000</code></li>\n\t<li><code>1 <= nums[i] <= 1000</code></li>\n\t<li>The test cases will be generated such that the answer is unique.</li>\n</ul>\n",
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"difficulty": "Easy",
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"exampleTestcases": "[1,100,200,1,100]\n1\n[2,2,2,2,3]\n2",
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"categoryTitle": "Algorithms",
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"code": "class Solution {\npublic:\n int mostFrequent(vector<int>& nums, int key) {\n \n }\n};",
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"code": "class Solution {\n public int mostFrequent(int[] nums, int key) {\n \n }\n}",
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"code": "class Solution(object):\n def mostFrequent(self, nums, key):\n \"\"\"\n :type nums: List[int]\n :type key: int\n :rtype: int\n \"\"\"\n ",
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"code": "# @param {Integer[]} nums\n# @param {Integer} key\n# @return {Integer}\ndef most_frequent(nums, key)\n \nend",
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"code": "class Solution {\n fun mostFrequent(nums: IntArray, key: Int): Int {\n \n }\n}",
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"lang": "Rust",
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"code": "impl Solution {\n pub fn most_frequent(nums: Vec<i32>, key: i32) -> i32 {\n \n }\n}",
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"code": "class Solution {\n\n /**\n * @param Integer[] $nums\n * @param Integer $key\n * @return Integer\n */\n function mostFrequent($nums, $key) {\n \n }\n}",
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"code": "function mostFrequent(nums: number[], key: number): number {\n\n};",
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"code": "(define/contract (most-frequent nums key)\n (-> (listof exact-integer?) exact-integer? exact-integer?)\n\n )",
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"lang": "Erlang",
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"code": "-spec most_frequent(Nums :: [integer()], Key :: integer()) -> integer().\nmost_frequent(Nums, Key) ->\n .",
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"code": "defmodule Solution do\n @spec most_frequent(nums :: [integer], key :: integer) :: integer\n def most_frequent(nums, key) do\n\n end\nend",
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"hints": [
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"Count the number of times each target value follows the key in the array.",
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"Choose the target with the maximum count and return it."
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],
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"solution": null,
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"sampleTestCase": "[1,100,200,1,100]\n1",
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