mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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181 lines
16 KiB
JSON
181 lines
16 KiB
JSON
{
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"question": {
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"questionId": "2721",
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"questionFrontendId": "2615",
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"boundTopicId": null,
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"title": "Sum of Distances",
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"titleSlug": "sum-of-distances",
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"content": "<p>You are given a <strong>0-indexed</strong> integer array <code>nums</code>. There exists an array <code>arr</code> of length <code>nums.length</code>, where <code>arr[i]</code> is the sum of <code>|i - j|</code> over all <code>j</code> such that <code>nums[j] == nums[i]</code> and <code>j != i</code>. If there is no such <code>j</code>, set <code>arr[i]</code> to be <code>0</code>.</p>\n\n<p>Return <em>the array </em><code>arr</code><em>.</em></p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,3,1,1,2]\n<strong>Output:</strong> [5,0,3,4,0]\n<strong>Explanation:</strong> \nWhen i = 0, nums[0] == nums[2] and nums[0] == nums[3]. Therefore, arr[0] = |0 - 2| + |0 - 3| = 5. \nWhen i = 1, arr[1] = 0 because there is no other index with value 3.\nWhen i = 2, nums[2] == nums[0] and nums[2] == nums[3]. Therefore, arr[2] = |2 - 0| + |2 - 3| = 3. \nWhen i = 3, nums[3] == nums[0] and nums[3] == nums[2]. Therefore, arr[3] = |3 - 0| + |3 - 2| = 4. \nWhen i = 4, arr[4] = 0 because there is no other index with value 2. \n\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [0,5,3]\n<strong>Output:</strong> [0,0,0]\n<strong>Explanation:</strong> Since each element in nums is distinct, arr[i] = 0 for all i.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 10<sup>5</sup></code></li>\n\t<li><code>0 <= nums[i] <= 10<sup>9</sup></code></li>\n</ul>\n",
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"translatedTitle": null,
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"difficulty": "Medium",
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"likes": 643,
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"similarQuestions": "[{\"title\": \"Remove Duplicates from Sorted Array\", \"titleSlug\": \"remove-duplicates-from-sorted-array\", \"difficulty\": \"Easy\", \"translatedTitle\": null}, {\"title\": \"Find All Duplicates in an Array\", \"titleSlug\": \"find-all-duplicates-in-an-array\", \"difficulty\": \"Medium\", \"translatedTitle\": null}, {\"title\": \"Minimum Operations to Make All Array Elements Equal\", \"titleSlug\": \"minimum-operations-to-make-all-array-elements-equal\", \"difficulty\": \"Medium\", \"translatedTitle\": null}]",
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"exampleTestcases": "[1,3,1,1,2]\n[0,5,3]",
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"categoryTitle": "Algorithms",
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"contributors": [],
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"topicTags": [
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{
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"name": "Array",
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"slug": "array",
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"translatedName": null,
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"__typename": "TopicTagNode"
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},
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"name": "Hash Table",
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},
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{
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"name": "Prefix Sum",
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"slug": "prefix-sum",
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"lang": "C++",
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"langSlug": "cpp",
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"code": "class Solution {\npublic:\n vector<long long> distance(vector<int>& nums) {\n \n }\n};",
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"__typename": "CodeSnippetNode"
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"lang": "Java",
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"langSlug": "java",
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"code": "class Solution {\n public long[] distance(int[] nums) {\n \n }\n}",
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"__typename": "CodeSnippetNode"
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"lang": "Python",
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"langSlug": "python",
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"code": "class Solution(object):\n def distance(self, nums):\n \"\"\"\n :type nums: List[int]\n :rtype: List[int]\n \"\"\"\n ",
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"langSlug": "c",
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"code": "/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nlong long* distance(int* nums, int numsSize, int* returnSize){\n\n}",
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"code": "public class Solution {\n public long[] Distance(int[] nums) {\n \n }\n}",
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"code": "/**\n * @param {number[]} nums\n * @return {number[]}\n */\nvar distance = function(nums) {\n \n};",
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"code": "class Solution {\n\n /**\n * @param Integer[] $nums\n * @return Integer[]\n */\n function distance($nums) {\n \n }\n}",
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"lang": "Kotlin",
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"langSlug": "kotlin",
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"code": "class Solution {\n fun distance(nums: IntArray): LongArray {\n \n }\n}",
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"lang": "Dart",
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"langSlug": "dart",
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"code": "class Solution {\n List<int> distance(List<int> nums) {\n\n }\n}",
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"lang": "Go",
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"langSlug": "golang",
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"code": "func distance(nums []int) []int64 {\n \n}",
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"lang": "Ruby",
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"langSlug": "ruby",
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"code": "# @param {Integer[]} nums\n# @return {Integer[]}\ndef distance(nums)\n \nend",
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"lang": "Scala",
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"langSlug": "scala",
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"code": "object Solution {\n def distance(nums: Array[Int]): Array[Long] = {\n \n }\n}",
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"lang": "Rust",
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"langSlug": "rust",
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"code": "impl Solution {\n pub fn distance(nums: Vec<i32>) -> Vec<i64> {\n \n }\n}",
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"lang": "Racket",
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"langSlug": "racket",
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"code": "(define/contract (distance nums)\n (-> (listof exact-integer?) (listof exact-integer?))\n\n )",
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"lang": "Erlang",
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"langSlug": "erlang",
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"code": "-spec distance(Nums :: [integer()]) -> [integer()].\ndistance(Nums) ->\n .",
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"lang": "Elixir",
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"langSlug": "elixir",
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"code": "defmodule Solution do\n @spec distance(nums :: [integer]) :: [integer]\n def distance(nums) do\n\n end\nend",
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"stats": "{\"totalAccepted\": \"15.9K\", \"totalSubmission\": \"53.4K\", \"totalAcceptedRaw\": 15939, \"totalSubmissionRaw\": 53448, \"acRate\": \"29.8%\"}",
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"hints": [
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"Can we use the prefix sum here?",
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"For each number x, collect all the indices where x occurs, and calculate the prefix sum of the array.",
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"For each occurrence of x, the indices to the right will be regular subtraction while the indices to the left will be reversed subtraction."
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],
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"solution": null,
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"status": null,
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"sampleTestCase": "[1,3,1,1,2]",
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