Problem:
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Matrix Multiplication

Write a program which reads a $n \times m$ matrix $A$ and a $m \times l$ matrix $B$, and prints their product, a $n \times l$ matrix $C$. An element of matrix $C$ is obtained by the following formula:

\[
c_{ij} = \sum_{k=1}^m a_{ik}b_{kj}
\]

where $a_{ij}$, $b_{ij}$ and $c_{ij}$ are elements of $A$, $B$ and $C$ respectively.

Input

In the first line, three integers $n$, $m$ and $l$ are given separated by space characters

In the following lines, the $n \times m$ matrix $A$ and the $m \times l$ matrix $B$ are given.

Output

Print elements of the $n \times l$ matrix $C$ ($c_{ij}$). Print a single space character between adjacent elements.

Constraints

$1 \leq n, m, l \leq 100$

$0 \leq a_{ij}, b_{ij} \leq 10000$

Sample Input

3 2 3
1 2
0 3
4 5
1 2 1
0 3 2

Sample Output

1 8 5
0 9 6
4 23 14

Note

      解説

Solution in C# (judge verdict: Accepted)

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

namespace _1_7_d
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] a = Console.ReadLine().Split(' ');
            long n = long.Parse(a[0]);
            long m = long.Parse(a[1]);
            long l = long.Parse(a[2]);

            long[,] arrayA = new long[n,m];
            long[,] arrayB = new long[m,l];
            long[,] arrayC = new long[n,l];

            for (int i = 0; i < n; i++)
            {
                string[] b = Console.ReadLine().Split(' ');//1行読む
                for (int j = 0; j < m; j++)//1行読んだ配列を列ごとに処理
                {
                    arrayA[i, j] = int.Parse(b[j]);
                }
            }
            for (int i = 0; i < m; i++)
            {
                string[] b = Console.ReadLine().Split(' ');//1行読む
                for (int j = 0; j < l; j++)//1行読んだ配列を列ごとに処理
                {
                    arrayB[i, j] = int.Parse(b[j]);
                }
            }
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < l; j++)
                {
                    for (int k = 0; k < m; k++)
                    {
                        arrayC[i, j] += arrayA[i, k] * arrayB[k,j];
                    } 
                    
                }
            }
            for (int i = 0; i < n; i++)
            {
                for(int j = 0; j < l;  j++)
                {
                    Console.Write(arrayC[i,j]);

                    if (j != l - 1)
                    {
                        Console.Write(' ');//空白
                    }
                }
                Console.Write('\n');
            }
            Console.ReadKey();
        }
    }
}