#3070

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

specialist · 745 · lc medium +31 · verified · 58.3% accepted · 165 likes · top 54%

Description

Given a 0-indexed integer matrix grid and an integer k, count all submatrices that include the top-left cell of grid and whose element sum does not exceed 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.

Code

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class Solution:
    def countSubmatrices(self, grid: List[List[int]], k: int) -> int:

class Solution:
    def countSubmatrices(self, grid: List[List[int]], k: int) -> int: