Package g3001_3100.s3070_count_submatrices_with_top_left_element_and_sum_less_than_k

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    3070 - Count Submatrices with Top-Left Element and Sum Less Than k\.

    Medium

    You are given a 0-indexed integer matrix grid and an integer k.

    Return the number of submatrices that contain the top-left element of the grid, and have a sum less than or equal to k.

    Example 1:

    Input: grid = \[\[7,6,3],6,6,1], k = 18

    Output: 4

    Explanation: There are only 4 submatrices, shown in the image above, that contain the top-left element of grid, and have a sum less than or equal to 18.

    Example 2:

    Input: grid = \[\[7,2,9],1,5,0,2,6,6], k = 20

    Output: 6

    Explanation: There are only 6 submatrices, shown in the image above, that contain the top-left element of grid, and have a sum less than or equal to 20.

    Constraints:

    • m == grid.length

    • n == grid[i].length

    • 1 <= n, m <= 1000

    • 0 <= grid[i][j] <= 1000

    • <code>1 <= k <= 10<sup>9</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 Integer countSubmatrices(Array<IntArray> grid, Integer k)

      • Methods inherited from class java.lang.Object

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