Leetcode Problem 463. Island Perimeter

463. Island Perimeter

Leetcode Solutions

Approach: Simple Counting

Initialize a variable perimeter to 0 to store the total perimeter.
Iterate over each cell in the grid using nested loops.
For each cell, check if it is a land cell (grid[i][j] == 1).
If it is a land cell, assume it contributes 4 to the perimeter.
Check each of the four possible neighbors (UP, RIGHT, DOWN, LEFT).
If a neighbor is also a land cell, subtract 1 from the perimeter for that side.
Add the resulting perimeter for the cell to the total perimeter.
After iterating over all cells, return the total perimeter.

Approach: Better Counting

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