KTLT - Lesson 2 - 5

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

namespace Bai5
{
    class Program
    {
        static void Main(string[] args)
        {
            int m, n, p;
            int[,] a, b, res;
            string[] temp = Console.ReadLine().Split();
            m = int.Parse(temp[0]);
            n = int.Parse(temp[1]);
            p = int.Parse(temp[2]);

            a = new int[m, n];
            b = new int[n, p];
            res = new int[m, p];
            insertMatrix(a);
            insertMatrix(b);
            task(a, b, res);
            showMatrix(res);
        }

        static void insertMatrix(int[,] a)
        {
            for (int i = 0; i < a.GetLength(0); i++)
            {
                string[] temp = Console.ReadLine().Split();
                for (int j = 0; j < a.GetLength(1); j++)
                {
                    a[i, j] = int.Parse(temp[j]);
                }
            }
        }


        static void task(int[,] a, int[,] b, int[,] res)
        {
            for (int i = 0; i < res.GetLength(0); i++)
            {
                for (int j = 0; j < res.GetLength(1); j++)
                {
                    res[i, j] = 0;
                    for (int k = 0; k < res.GetLength(0); k++)
                    {
                        res[i, j] += a[i, k] * b[k, j];
                    }
                }
            }
        }

        static void showMatrix(int[,] res)
        {
            for (int i = 0; i < res.GetLength(0); i++)
            {
                for (int j = 0; j < res.GetLength(1); j++)
                {
                    Console.Write($"{res[i, j]} ");
                }
                Console.WriteLine();
            }
        }
    }
}