How to Solve Number of Adjacent Elements With the Same Color Problem
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Number of Adjacent Elements With the Same Color
You are given an integer n representing an array colors of length n where all elements are set to 0's meaning uncolored. You are also given a 2D integer array queries where queries[i] = [indexi, color...
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Understanding the Number of Adjacent Elements With the Same Color Problem
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Problem Statement
You are given an integer n representing an array colors of length n where all elements are set to 0's meaning uncolored. You are also given a 2D integer array queries where queries[i] = [indexi, colori]. For the ith query: Set colors[indexi] to colori. Count the number of adjacent pairs in colors which have the same color (regardless of colori). Return an array answer of the same length as queries where answer[i] is the answer to the ith query.
Number of Adjacent Elements With the Same Color
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Examples
n = 4, queries = [[0,2],[1,2],[3,1],[1,1],[2,1]][0,1,1,0,2]Initially array colors = [0,0,0,0], where 0 denotes uncolored elements of the array. After the 1st query colors = [2,0,0,0]. The count of adjacent pairs with the same color is 0. After the 2nd query colors = [2,2,0,0]. The count of adjacent pairs with the same color is 1. After the 3rd query colors = [2,2,0,1]. The count of adjacent pairs with the same color is 1. After the 4th query colors = [2,1,0,1]. The count of adjacent pairs with the same color is 0. After the 5th query colors = [2,1,1,1]. The count of adjacent pairs with the same color is 2.
n = 1, queries = [[0,100000]][0]After the 1st query colors = [100000]. The count of adjacent pairs with the same color is 0.
Constraints
1 <= n <= 1051 <= queries.length <= 105queries[i].length == 20 <= indexi <= n - 11 <= colori <= 105How Interview Coder Helps with Leetcode Problems
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