Package g2701_2800.s2718_sum_of_matrix_after_queries

Class Solution

java.lang.Object
g2701_2800.s2718_sum_of_matrix_after_queries.Solution
public class Solution extends Object
2718 - Sum of Matrix After Queries.

Medium

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.

Example 1:

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

Output: 23

Explanation: The image above describes the matrix after each query. The sum of the matrix after all queries are applied is 23.

Example 2:

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

Output: 17

Explanation: The image above describes the matrix after each query. The sum of the matrix after all queries are applied is 17.

Constraints:

  • 1 <= n <= 104
  • 1 <= queries.length <= 5 * 104
  • queries[i].length == 3
  • 0 <= typei <= 1
  • 0 <= indexi < n
  • 0 <= vali <= 105

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • matrixSumQueries

      public long matrixSumQueries(int n, int[][] queries)