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Solution: Island Perimeter

Understand how to calculate the perimeter of an island represented in a grid, where land cells connect horizontally or vertically. Learn to iterate through a matrix, assess adjacent cells, and reduce edges to find the total island perimeter efficiently. This lesson covers the algorithm, its time and space complexity, and practical application with Go.

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. ...