// $Id: matrix.java,v 1.3 2001/05/27 14:52:57 doug Exp $ // http://www.bagley.org/~doug/shootout/ // modified to use a little less memory by Thomas Holenstein import java.io.*; import java.util.*; public class matrix { static int SIZE = 30; public static void main(String args[]) { int n = Integer.parseInt(args[0]); int m1[][] = mkmatrix(SIZE, SIZE); int m2[][] = mkmatrix(SIZE, SIZE); int mm[][] = new int[SIZE][SIZE]; for (int i=0; i<n; i++) { mmult(SIZE, SIZE, m1, m2, mm); } System.out.print(mm[0][0]); System.out.print(" "); System.out.print(mm[2][3]); System.out.print(" "); System.out.print(mm[3][2]); System.out.print(" "); System.out.println(mm[4][4]); } public static int[][] mkmatrix (int rows, int cols) { int count = 1; int m[][] = new int[rows][cols]; for (int i=0; i<rows; i++) { for (int j=0; j<cols; j++) { m[i][j] = count++; } } return(m); } public static void mmult (int rows, int cols, int[][] m1, int[][] m2, int[][] m3) { for (int i=0; i<rows; i++) { for (int j=0; j<cols; j++) { int val = 0; for (int k=0; k<cols; k++) { val += m1[i][k] * m2[k][j]; } m3[i][j] = val; } } } }