{ "data": { "question": { "questionId": "2779", "questionFrontendId": "2672", "categoryTitle": "Algorithms", "boundTopicId": 2254952, "title": "Number of Adjacent Elements With the Same Color", "titleSlug": "number-of-adjacent-elements-with-the-same-color", "content": "

There is a 0-indexed array nums of length n. Initially, all elements are uncolored (has a value of 0).

\n\n

You are given a 2D integer array queries where queries[i] = [indexi, colori].

\n\n

For each query, you color the index indexi with the color colori in the array nums.

\n\n

Return an array answer of the same length as queries where answer[i] is the number of adjacent elements with the same color after the ith query.

\n\n

More formally, answer[i] is the number of indices j, such that 0 <= j < n - 1 and nums[j] == nums[j + 1] and nums[j] != 0 after the ith query.

\n\n

 

\n

Example 1:

\n\n
\nInput: n = 4, queries = [[0,2],[1,2],[3,1],[1,1],[2,1]]\nOutput: [0,1,1,0,2]\nExplanation: Initially array nums = [0,0,0,0], where 0 denotes uncolored elements of the array.\n- After the 1st query nums = [2,0,0,0]. The count of adjacent elements with the same color is 0.\n- After the 2nd query nums = [2,2,0,0]. The count of adjacent elements with the same color is 1.\n- After the 3rd query nums = [2,2,0,1]. The count of adjacent elements with the same color is 1.\n- After the 4th query nums = [2,1,0,1]. The count of adjacent elements with the same color is 0.\n- After the 5th query nums = [2,1,1,1]. The count of adjacent elements with the same color is 2.\n
\n\n

Example 2:

\n\n
\nInput: n = 1, queries = [[0,100000]]\nOutput: [0]\nExplanation: Initially array nums = [0], where 0 denotes uncolored elements of the array.\n- After the 1st query nums = [100000]. The count of adjacent elements with the same color is 0.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "有相同颜色的相邻元素数目", "translatedContent": "

给你一个下标从 0 开始、长度为 n 的数组 nums 。一开始，所有元素都是 未染色 （值为 0 ）的。

\n\n

给你一个二维整数数组 queries ，其中 queries[i] = [indexi, colori] 。

\n\n

对于每个操作，你需要将数组 nums 中下标为 indexi 的格子染色为 colori 。

\n\n

请你返回一个长度与 queries 相等的数组 answer ，其中 answer[i]是前 i 个操作 之后 ，相邻元素颜色相同的数目。

\n\n

更正式的，answer[i] 是执行完前 i 个操作后，0 <= j < n - 1 的下标 j 中，满足 nums[j] == nums[j + 1] 且 nums[j] != 0 的数目。

\n\n

 

\n\n

示例 1：

\n\n
\n输入：n = 4, queries = [[0,2],[1,2],[3,1],[1,1],[2,1]]\n输出：[0,1,1,0,2]\n解释：一开始数组 nums = [0,0,0,0] ，0 表示数组中还没染色的元素。\n- 第 1 个操作后，nums = [2,0,0,0] 。相邻元素颜色相同的数目为 0 。\n- 第 2 个操作后，nums = [2,2,0,0] 。相邻元素颜色相同的数目为 1 。\n- 第 3 个操作后，nums = [2,2,0,1] 。相邻元素颜色相同的数目为 1 。\n- 第 4 个操作后，nums = [2,1,0,1] 。相邻元素颜色相同的数目为 0 。\n- 第 5 个操作后，nums = [2,1,1,1] 。相邻元素颜色相同的数目为 2 。\n
\n\n

示例 2：

\n\n
\n输入：n = 1, queries = [[0,100000]]\n输出：[0]\n解释：一开始数组 nums = [0] ，0 表示数组中还没染色的元素。\n- 第 1 个操作后，nums = [100000] 。相邻元素颜色相同的数目为 0 。\n
\n\n

 

\n\n

提示：

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Similarly contributes its left element too.", "After changing the color, if the element has the same color as its right element answer increases by 1. Similarly contributes its left element too." ], "solution": null, "status": null, "sampleTestCase": "4\n[[0,2],[1,2],[3,1],[1,1],[2,1]]", "metaData": "{\n \"name\": \"colorTheArray\",\n \"params\": [\n {\n \"name\": \"n\",\n \"type\": \"integer\"\n },\n {\n \"type\": \"integer[][]\",\n \"name\": \"queries\"\n }\n ],\n \"return\": {\n \"type\": \"integer[]\"\n }\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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