underwaters softuni still underwork halfway on

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

     public  class Program
    {
        public static void Main(string[] args)
        {

        List<int> airArray = Console.ReadLine().Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries).Select(int.Parse)
            .ToList();
        List<int> rainDropArray = Console.ReadLine().Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries)
            .Select(int.Parse).ToList();


        List<int> AirArrayMaxes = new List<int>();

            if (airArray != null)
            for (int i = 0; i < airArray.Count; i++)
            {
                int startOfArray = i - 1;
                int left = startOfArray >= 0 ? airArray[startOfArray] : default(int);
                int central = airArray[i];
                int endOfArray = i + 1;
                int right = endOfArray <= airArray.Count - 1 ? airArray[i + 1] : default(int);

                bool localMax = left < central && central > right;

                if (localMax)
                {
                    AirArrayMaxes.Add(central);
                }
            }

        int lowerwith = AirArrayMaxes.Count;
        List<int> ModifiedRainArray = new List<int>();

            if (rainDropArray != null)
            for (int j = 0; j < rainDropArray.Count; j++)
            {
                rainDropArray[j] -= lowerwith;
                if (rainDropArray[j] < 0)
                {
                    rainDropArray[j] = 0;
                }

                ModifiedRainArray.Add(rainDropArray[j]);
            }


        int airMax =AirArrayMaxes.Any()?AirArrayMaxes.Max():0;

        int rainMax = ModifiedRainArray.Any() ?ModifiedRainArray.Max():0;


        //int airMax = AirArrayMaxes.GroupBy(x => airfirst).Any(g => g.Any()) ? airfirst : 0;
        //int rainMax = ModifiedRainArray.GroupBy(x => rainfirst).Any(g => g.Any()) ? rainfirst : 0;

        if (airMax == rainMax)
        {
            Console.WriteLine("Something interesting was found!" + Environment.NewLine
                                                                 + "Sum: {0}", airMax + rainMax);

        }
        else
        {
            Console.WriteLine("There is nothing unordinary! " + Environment.NewLine +
                              "Difference: {0}", Math.Abs(airMax - rainMax));

        }
        }

    }