Polynomial

import java.util.Scanner;
import java.io.PrintWriter;
import java.io.File;

public class PlotPolynomial
{
  public static double calValue(double[] values, double raw, int degree)
  {
   double result = 0;
   for (int q = degree ; q >= 0 ; q--)
   {
    result += values[degree-q] * Math.pow(raw, q);
   }
   return result;
  }

  public static void main (String [] args) throws Exception
  {
   Scanner in = new Scanner(System.in);
   File f = new File ("plot.txt");
   PrintWriter pw = new PrintWriter(f);
   int count = Integer.parseInt(in.next());
   double [] values = new double [count+1];
   for (int q = 0 ; q < values.length ; q++)
   {
    values[q] = Double.parseDouble(in.next());
   }
   pw.println("  x\t  f(x)");
   for (double p = -10 ; p != 10.5 ; p += 0.5)
   {
    double result = calValue(values, p, count);
    String v = String.valueOf(p);
    if (v.charAt(v.length()-1) == '0') v = v.substring(0, v.length()-2);
    pw.printf("%4s\t%.2f", v, result);
    pw.println();
   }
   pw.close();
  }
}