基础练习 矩阵乘法
时间限制:1.0s 内存限制:512.0MB
问题描述
给定一个N阶矩阵A,输出A的M次幂(M是非负整数)
例如:
A =
1 2
3 4
A的2次幂
7 10
15 22
输入格式
第一行是一个正整数N、M(1<=N<=30, 0<=M<=5),表示矩阵A的阶数和要求的幂数
接下来N行,每行N个绝对值不超过10的非负整数,描述矩阵A的值
输出格式
输出共N行,每行N个整数,表示A的M次幂所对应的矩阵。相邻的数之间用一个空格隔开
样例输入
2 2
1 2
3 4
样例输出
7 10
15 22
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); while (scanner.hasNext()) { int n = scanner.nextInt(); int m = scanner.nextInt(); int[][] init = new int[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { init[i][j] = scanner.nextInt(); } } int[][] result = new int[n][n]; for (int i = 0; i < n; i++) { result[i][i] = 1; } powerOperation(result, init, m); printMatrix(result); } } private static void printMatrix(int[][] result) { int len = result.length; for (int i = 0; i < len; i++) { for (int j = 0; j < len; j++) { System.out.print(result[i][j]); System.out.print(j == len - 1 ? "\r\n" : " "); } } } private static void powerOperation(int[][] result, int[][] init, int m) { int len = init.length; for (int i = 0; i < m; i++) { int[][] temp = new int[len][len]; for (int j = 0; j < len; j++) { for (int j2 = 0; j2 < len; j2++) { for (int k = 0; k < len; k++) { temp[j][j2] += result[j][k] * init[k][j2]; } } } for (int j = 0; j < len; j++) { for (int j2 = 0; j2 < len; j2++) { result[j][j2] = temp[j][j2]; } } } } }
linux下的mysql修改默认编码
时间: 2024-10-03 04:03:00