Solution: Island Perimeter
Understand how to calculate the perimeter of an island in a matrix grid by iterating over cells, identifying connected land edges, and adjusting the perimeter count accordingly. This lesson teaches an efficient approach to solve the island perimeter problem using matrix traversal with O(row × col) time complexity.
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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...