import java.util.*;
import java.lang.*;
import java.io.*;
 
public class Main
{
  public static void main (String[] args) throws java.lang.Exception
  {
    double n, m;
    double x, min = 100, max = -100, sum = 0, a = 0, b = 0;
    Scanner in = new Scanner(System.in);
    n = in.nextDouble();
    m = in.nextDouble();
    for (int i = 0; i < m; i++){
      for (int j = 0; j < n; j ++){
        x = in.nextDouble();
        if (max == x) a++;
        if (max < x) {
          if (max != min) sum += a*max;
          a = 1;
          max = x;
        }
        if ( min == x) b++;
        if (min > x) {
          if (max != min) sum += b*min;
          b = 1;
          min = x;
        }
      if (x!= min && x != max) sum += x;
      }
      if(i == m-1) System.out.printf("%.2f", sum / (n - a - b));
      else System.out.printf("%.2f ", sum / (n - a - b));
      sum = a = b = 0;
      min = 100;
      max = -100;
    }
  }
}

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