3619. Count Islands With Total Value Divisible by K

You are given an m x n matrix grid and a positive integer k. An island is a group of positive integers (representing land) that are 4-directionally connected (horizontally or vertically). The total value of an island is the sum of the values of all cells in the island. Return the number of islands with a total value divisible by k. Example 1: Input: grid = [[0,2,1,0,0],[0,5,0,0,5],[0,0,1,0,0