Solution: Island Perimeter
Understand how to determine the perimeter of a single island in a rectangular grid by counting cell edges and subtracting shared boundaries. This lesson teaches how to systematically traverse a matrix, assess adjacent land cells, and compute the total outer perimeter with optimal time and space complexity.
We'll cover the following...
Statement
You are given a grid with dimensions row x col, where each cell represents either land (grid[i][j] = 1) or water (grid[i][j] = 0). The grid satisfies the following conditions:
Cells are connected only horizontally or vertically (not diagonally).
The grid is surrounded by water and contains exactly one island, consisting of one or more connected land cells.
The island has no lakes, meaning no water is enclosed within the island that connects to the surrounding water.
The grid is rectangular, and each cell is a square with a side length 1.
Your task is to calculate the perimeter of the island.
Constraints:
rowgrid.lengthcol...