JaggedArray2

using System;
using System.Linq;

namespace _06._Jagged_Array_Manipulator
{
    class Program
    {
        static void Main(string[] args)
        {
            int numberOfRows = int.Parse(Console.ReadLine());

            double[][] jaggedArray = new double[numberOfRows][];

            for (int row = 0; row < numberOfRows; row++)
            {
                jaggedArray[row] = Console.ReadLine()
                    .Split(" ")
                    .Select(double.Parse)
                    .ToArray();
            }

            for (int row = 0; row < numberOfRows - 1; row++)
            {
                if (jaggedArray[row].Length == jaggedArray[row + 1].Length)
                {
                    jaggedArray[row] = jaggedArray[row].Select(x => x * 2).ToArray();
                    jaggedArray[row + 1] = jaggedArray[row + 1].Select(x => x * 2).ToArray();
                }
                else
                {
                    jaggedArray[row] = jaggedArray[row].Select(x => x / 2).ToArray();
                    jaggedArray[row + 1] = jaggedArray[row + 1].Select(x => x / 2).ToArray();
                }
            }

            string input;

            while((input = Console.ReadLine()) != "End")
            {
                string[] commands = input.Split(" ");
                string command = commands[0];
                int row = int.Parse(commands[1]);
                int col = int.Parse(commands[2]);
                double value = double.Parse(commands[3]);

                bool isValid = ValidationRangeMatrix(jaggedArray, row, col);

                if (isValid)
                {
                    switch (command)
                    {
                        case "Add":
                            jaggedArray[row][col] += value;
                            break;
                        case "Subtract":
                            jaggedArray[row][col] -= value;
                            break;
                    }
                }
            }

            for (int row = 0; row < numberOfRows; row++)
            {
                Console.WriteLine(string.Join(" ", jaggedArray[row]));
            }
        }

        private static bool ValidationRangeMatrix(double[][] jaggedArray, int row, int col)
            => row >= 0 && jaggedArray.GetLength(0) > row && col >= 0 && jaggedArray[row].Length > col ?
            true : false;
    }
}