IslandPerimeter.swift

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// You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water.

// Grid cells are connected horizontally/vertically (not diagonally). The grid is completely surrounded by water, and there is exactly one island (i.e., one or more connected land cells).

// The island doesn't have "lakes" (water inside that isn't connected to the water around the island). One cell is a square with side length 1. The grid is rectangular, width and height don't exceed 100. Determine the perimeter of the island.

 

// Example:

// Input:
// [[0,1,0,0],
//  [1,1,1,0],
//  [0,1,0,0],
//  [1,1,0,0]]

// Output: 16

class Solution {
    func islandPerimeter(_ grid: [[Int]]) -> Int {
        
    }
}