How to Solve Sum of Matrix After Queries Problem
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Sum of Matrix After Queries
You are given an integer n and a 0-indexed 2D array queries where queries[i] = [typei, indexi, vali]. Initially, there is a 0-indexed n x n matrix filled with 0's. For each query, you must apply one o...
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Understanding the Sum of Matrix After Queries Problem
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Problem Statement
You are given an integer n and a 0-indexed 2D array queries where queries[i] = [typei, indexi, vali]. Initially, there is a 0-indexed n x n matrix filled with 0's. For each query, you must apply one of the following changes: if typei == 0, set the values in the row with indexi to vali, overwriting any previous values. if typei == 1, set the values in the column with indexi to vali, overwriting any previous values. Return the sum of integers in the matrix after all queries are applied.
Sum of Matrix After Queries
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Examples
n = 3, queries = [[0,0,1],[1,2,2],[0,2,3],[1,0,4]]23The image above describes the matrix after each query. The sum of the matrix after all queries are applied is 23.
n = 3, queries = [[0,0,4],[0,1,2],[1,0,1],[0,2,3],[1,2,1]]17The image above describes the matrix after each query. The sum of the matrix after all queries are applied is 17.
Constraints
1 <= n <= 1041 <= queries.length <= 5 * 104queries[i].length == 30 <= typei <= 10 <= indexi < n0 <= vali <= 105How Interview Coder Helps with Leetcode Problems
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