@Override
		public void run() {
			try {
				String dur=null;
				
				int[][] A = new int[cnt][cnt],B=new int[cnt][cnt],C=new int[cnt][cnt];
				int_mat(A);
				int_mat(B);
				long start=System.currentTimeMillis();
				integer_operation(A, B, C);
				long end=System.currentTimeMillis();
				dur=end-start+"";
				System.out.println("running time is"+dur);
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				System.out.println("exception");
			}
			// TODO Auto-generated method stub
			
		}