You are given an m x n matrix grid. A rhombus sum refers to the sum of the elements that form the border of a rhombus shape. The rhombus should be viewed as a square rotated 45 degrees, with each of its corners centered on a grid cell. Compute the biggest three distinct rhombus sums in the grid and return them in descending order. If there are fewer than three distinct sums, return all of them.
You are given two n x n binary matrices mat and target. Your task is to determine if it is possible to rotate the matrix mat in 90-degree increments so that it matches the target matrix.
In a given 2D grid, a peak element is an element that is greater than all of its adjacent elements (left, right, top, and bottom). You are given an m x n matrix mat where no two adjacent elements are equal. Your task is to find and return the coordinates of any peak element. The grid is surrounded by a perimeter filled with -1.
You are given two m x n binary matrices, grid1 and grid2, where each cell can either be 0 (representing water) or 1 (representing land). An island is a group of connected 1’s, connected either horizontally or vertically. An island in grid2 is considered a sub-island if there is a corresponding island in grid1 that contains all the cells of the island in grid2. Your task is to determine the number of sub-islands in grid2.
You are given an m x n integer matrix grid, where both m and n are even integers, and an integer k. The matrix consists of several concentric layers, and each layer can be thought of as a circular band of numbers. A cyclic rotation of a layer is done by shifting all its elements counter-clockwise by one position. You are asked to return the matrix after applying k cyclic rotations to each of its layers.
You are given a maze and need to find the nearest exit from the entrance. An exit is defined as an empty cell on the border of the maze. Return the shortest path to the nearest exit, or -1 if no exit is reachable.