C# Online Compiler | .NET Fiddle

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp5
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int[] p = { 2, 1, 0, 2, 1, 1, 0, 1, 2, 1, 1, 0, 0, 2,
                1 };
         
            Console.WriteLine(ORANGES(3, 5, p));
            Console.ReadLine();
        }

        public static int ORANGES(int input1, int input2, int[] input3)
        {
           
            int[,] matrix = new int[input1, input2];
            int indexCrate = 0;
            bool existsFresh = false;
            for (int i = 0; i < input1; i++)//row
            {
                for (int j = 0; j < input2; j++) //column   
                {
                    matrix[i, j] = input3[indexCrate];
                    if(matrix[i, j] == 1)
                    {
                        existsFresh = true;
                    }
                    indexCrate++;
                }
            }


            //day1
           
            int day = 0;
            do
            {
                day++;
                existsFresh = false;
                for (int i = 0; i < input1; i++)//row
                {
                    for (int j = 0; j < input2; j++) //column   
                    {
                        if (matrix[i, j] == 1)
                        {
                            existsFresh = true;
                            bool anyRotten = false;
                            if ((i-1) >= 0 && matrix[i - 1, j] == 2)
                            {
                                anyRotten = true;
                            }
                            if ((i + 1) < input1 && matrix[i + 1, j] == 2)
                            {
                                anyRotten = true;
                            }
                            if ((j-1)>=0 && matrix[i, j - 1] == 2)
                            {
                                anyRotten = true;
                            }
                            if ((j+1) < input2 && matrix[i, j + 1] == 2)
                            {
                                anyRotten = true;
                            }
                            if (anyRotten)
                            {
                                matrix[i, j] = 2;
                            }
                        }

                    }
                }

            } while (existsFresh);

            return day;


        }

   

       
    }
}

                            if ((i + 1) < input1 && matrix[i + 1, j] == 2)
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
​
namespace ConsoleApp5
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int[] p = { 2, 1, 0, 2, 1, 1, 0, 1, 2, 1, 1, 0, 0, 2,
                1 };
         
            Console.WriteLine(ORANGES(3, 5, p));
            Console.ReadLine();
        }
​
        public static int ORANGES(int input1, int input2, int[] input3)
        {
           
            int[,] matrix = new int[input1, input2];
            int indexCrate = 0;

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