class MatMul {

   public static void main (String [] argv) {

     for (int n = 8; n <= 128; n*=2) {
       double [][] a = new double [n][];
       double [][] b = new double [n][];
       double [][] c = new double [n][];
       for (int i = 0; i < n; i++) {
           a[i] = new double [n];
           b[i] = new double [n];
           c[i] = new double [n];
       }

       long ms = System.currentTimeMillis();

       for (int i = 0; i < n; i++) {
         for (int j = 0; j < n; j++) {
           for (int k = 0; k < n; k++) {
             c[i][j] += a[i][k] * b[k][j];
           }
         }
       }

       ms = System.currentTimeMillis() - ms;
       // System.out.println("N = " + n + ", Mflops = " +
       //                      ((double) 2*n*n*n)/((double) ms*1000));
       System.out.println("ok");
     }
   }
}