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 JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str[] = br.readLine().split(" ");
        int n = Integer.parseInt(str[0]);
        int m = Integer.parseInt(str[1]);
        int l = Integer.parseInt(str[2]);
        int[][] a = new int[n][m];
        int[][] b = new int[m][l];
        long result;
        StringBuilder sb = new StringBuilder();
        for(int i=0;i<n;i++){
            str = br.readLine().split(" ");
            for(int j=0;j<m;j++){
                a[i][j] = Integer.parseInt(str[j]);
            }
        }
        for(int i=0;i<m;i++){
            str = br.readLine().split(" ");
            for(int j=0;j<l;j++){
                b[i][j] = Integer.parseInt(str[j]);
            }
        }
        for(int i=0;i<n;i++){
            for(int j=0;j<l;j++){
                result = 0;
                for(int k=0;k<m;k++){
                    result += a[i][k] * b[k][j];
                }
                if(j<l-1) sb.append(result).append(" ");
                else sb.append(result).append("\n");
            }
        }
        System.out.print(sb);
    }
}