using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(ContaminatedLake(test1));

    }

    // There is a grid of lakes connected by streams,

    // the lakes can be mapped to an x,y grid

    // each unit in the grid represents a plot of land

    // plots of land == 0 are dry

    // plots of land == 1 contain a clean lake

    // plots of land == 2 contain a contaminated lake

    // every year, contaminated lakes will affect clean lakes that are adjacent (up, down, left, right)

    // find out how many years it will take for all lakes to become contaminated

    // return -1 if there is a clean lake that will never be contaminated

    // example A will return 2 because it will take 2 years to poison all lakes

    // [0, 1, 0]

    // [0, 1, 2]

    // example B will return -1 because one lake will never become contaminated

    // [1, 0, 0]

    // [0, 1, 2]

    public static int[][] test1 = new int[3][] { new int[] {0, 1, 2, 0}, 

                                                new int[]{1, 1, 2, 0}, 

                                                new int[]{1, 0, 0, 0} };

​

    public static int[][] test2 =  new int[3][] { new int[] {0, 1, 2, 0}, 

                                                 new int[]{0, 1, 2, 0}, 

                                                 new int[]{1, 0, 0, 0} };

​

    public static int ContaminatedLake(int[][] grid) {

    // write code here 

        return 0;

    }

}