Package g1301_1400.s1314_matrix_block_sum

Class Solution

java.lang.Object

g1301_1400.s1314_matrix_block_sum.Solution

public class Solution
extends Object

1314 - Matrix Block Sum\. Medium Given a `m x n` matrix `mat` and an integer `k`, return _a matrix_ `answer` _where each_ `answer[i][j]` _is the sum of all elements_ `mat[r][c]` _for_: * `i - k <= r <= i + k,` * `j - k <= c <= j + k`, and * `(r, c)` is a valid position in the matrix. **Example 1:** **Input:** mat = \[\[1,2,3],[4,5,6],[7,8,9]], k = 1 **Output:** [[12,21,16],[27,45,33],[24,39,28]] **Example 2:** **Input:** mat = \[\[1,2,3],[4,5,6],[7,8,9]], k = 2 **Output:** [[45,45,45],[45,45,45],[45,45,45]] **Constraints:** * `m == mat.length` * `n == mat[i].length` * `1 <= m, n, k <= 100` * `1 <= mat[i][j] <= 100`

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int[][]	matrixBlockSum(int[][] mat, int k)

Methods inherited from class java.lang.Object

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

Constructor Details

Solution

public Solution()

Method Details

matrixBlockSum

public int[][] matrixBlockSum(int[][] mat,
 int k)