Search⌘ K
AI Features

Solution: Island Perimeter

Explore how to compute the perimeter of an island represented in a grid by examining each cell and its neighbors. This lesson teaches you to apply matrix traversal techniques and adjacency rules to identify shared edges and accurately determine the island's perimeter, preparing you for matrix-related coding interview problems.

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. ...