Island Perimeter Calculation In PHP: A Simple Approach
Calculate island perimeter: iterate through grid, add 4 for each land cell, subtract 2 for shared edges with neighbors. Example usage: $grid = [[0,1,0,0],[1,1,1,0],[0,1,0,0],[1,1,0,0]]; echo islandPerimeter($grid); // Output: 16
463. Island Perimeter Difficulty: Easy Topics: Array, Depth-First Search, Breadth-First Search, Matrix You are given row x col grid representing a map where grid[i][j] = 1 represents land and grid[i][j] = 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely surrounded by water, and there is exactly one island (i.e., one or more connected land cells). The island doesn't have "lakes", meaning the water inside isn't connected to the water around the island. One cell is a square with side length 1. The grid is rectangular, width and height d...