3.4

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

namespace Les3
{
    class Program
    {
        static void Main(string[] args)
        {

            Console.Title = "3.4 Наибольшый элемент";

            int[,] arrMatrix = {
                                 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 },
                                 { 2, 0, 6, 5, 8, 9, 3, 2, 3, 2 },
                                 { 3, 5, 11, 9, 78, 74, 3, 1, 2, 2 },
                                 { 4, 9, 6, 1, 2, 2, 3, 2, 9, 2 },
                                 { 5, 5, 60, 0, 2, 5, 3, 2, 7, 2 },
                                 { 6, 5, 6, 3, 8, 9, 3, 2, 0, 2 },
                                 { 7, 7, 79, 5, 9, 24, 3, 1, 9, 2 },
                                 { 8, 5, 6, 8, 2, 0, 3, 2, 4, 2 },
                                 { 9, 22, 6, 15, 2, 5, 13, 0, 2, 2 },
                                 { 0, 5, 6, 5, 2, 4, 3, 2, 9, 2 }
                               };

            int iMax = 0;
            int x = 0;
            int y = 0;

            for (int i = 0; i < arrMatrix.GetLength(0); i++)
            {
                for (int j = 0; j < arrMatrix.GetLength(1); j++)
                {
                    if(arrMatrix[i, j] > iMax)
                    {
                        iMax = arrMatrix[i, j];
                        x = i;
                        y = j;
                    }
                }
                Console.WriteLine();
            }

            Console.SetCursorPosition(0, 0);
            for (int i = 0; i < arrMatrix.GetLength(0); i++)
            {
                for (int j = 0; j < arrMatrix.GetLength(1); j++)
                {
                    Console.Write(arrMatrix[i, j] + " ");
                }
                Console.WriteLine();
            }

            Console.WriteLine();
            Console.WriteLine($"Наибольшее значение элементов матрицы: {iMax}");
            arrMatrix[x, y] = 0;

            Console.SetCursorPosition(0, arrMatrix.GetLength(0) + 4);
            for (int i = 0; i < arrMatrix.GetLength(0); i++)
            {
                for (int j = 0; j < arrMatrix.GetLength(1); j++)
                {
                    Console.Write(arrMatrix[i, j] + " ");
                }
                Console.WriteLine();
            }

            Console.ReadKey();

        }
    }
}