Package g2601_2700.s2672_number_of_adjacent_elements_with_the_same_color

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    2672 - Number of Adjacent Elements With the Same Color.

    Medium

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

    You are given a 2D integer array queries where <code>queriesi = index<sub>i</sub>, color<sub>i</sub></code>.

    For each query, you color the index <code>index<sub>i</sub></code> with the color <code>color<sub>i</sub></code> in the array nums.

    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 <code>i<sup>th</sup></code> query.

    More formally, answer[i] is the number of indices j, such that 0 &lt;= j &lt; n - 1 and nums[j] == nums[j + 1] and nums[j] != 0 after the <code>i<sup>th</sup></code> query.

    Example 1:

    Input: n = 4, queries = [0,2,1,2,3,1,1,1,2,1]

    Output: 0,1,1,0,2

    Explanation: Initially array nums = 0,0,0,0, where 0 denotes uncolored elements of the array.

    • After the 1<sup>st</sup> query nums = 2,0,0,0. The count of adjacent elements with the same color is 0.

    • After the 2<sup>nd</sup> query nums = 2,2,0,0. The count of adjacent elements with the same color is 1.

    • After the 3<sup>rd</sup> query nums = 2,2,0,1. The count of adjacent elements with the same color is 1.

    • After the 4<sup>th</sup> query nums = 2,1,0,1. The count of adjacent elements with the same color is 0.

    • After the 5<sup>th</sup> query nums = 2,1,1,1. The count of adjacent elements with the same color is 2.

    Example 2:

    Input: n = 1, queries = [0,100000]

    Output: 0

    Explanation: Initially array nums = 0, where 0 denotes uncolored elements of the array.

    • After the 1<sup>st</sup> query nums = 100000. The count of adjacent elements with the same color is 0.

    Constraints:

    • <code>1 <= n <= 10<sup>5</sup></code>

    • <code>1 <= queries.length <= 10<sup>5</sup></code>

    • queries[i].length == 2

    • <code>0 <= index<sub>i</sub><= n - 1</code>

    • <code>1 <= color<sub>i</sub><= 10<sup>5</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final IntArray colorTheArray(Integer n, Array<IntArray> queries)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait