Random Surfer in java program

RandomSurfer.java

public class RandomSurfer 

{

 public static void main(String[] args) 

{

        int T = Integer.parseInt(args[0]);    

        int M = StdIn.readInt();             

        int N = StdIn.readInt();              

        double[][] p = new double[N][N];     

        for (int i = 0; i < N; i++)

            for (int j = 0; j < N; j++) 

                p[i][j] = StdIn.readDouble(); 

        int[] freq = new int[N];            

         int page = 0;

         for (int t = 0; t < T; t++) 

            {

            double r = Math.random(); 

            double sum = 0.0; 

            for (int j = 0; j < N; j++) 

           {

                         sum += p[page][j]; 

            if (r < sum) { page = j; break;

            } 

            } 

            freq[page]++; 

        } 

       for (int i = 0; i < N; i++) 

      {

            StdOut.printf("%8.5f", (double) freq[i] / T); 

        }

        StdOut.println(); 

    }  

}