content: package v102;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.util.StringTokenizer;
  
  public class TheKissingCircles_UVa10283 {
  	
  	
  	public static void main(String[] args) throws IOException {
  		
  		Scanner sc = new Scanner(System.in);
  		PrintWriter out = new PrintWriter(System.out);
  		
  		while(sc.ready())
  		{
  			int R = sc.nextInt(), n = sc.nextInt();
  			if(n == 1)
  			{
  				out.printf("%.10f %.10f %.10f\n", (double)R, 0.0, 0.0);
  				continue;
  			}
  			double c = Math.cos(Math.PI*(n - 2) / (2 * n));
  			double r = R * c / (1 + c);
  			double b = areaPolygon(n, 2 * r) - sectorArea(180.0 * (n - 2) / n, r) * n;
  			double g = Math.PI * R * R - n * Math.PI * r * r - b;
  			out.printf("%.10f %.10f %.10f\n", r, b, g);
  		}
  		out.flush();
  
  	}
  	
  	static double areaPolygon(int n, double l)
  	{
  		double angle = Math.PI * (n - 2) / n / 2.0;
  		double apothem = Math.tan(angle) * l / 2;
  		double perimeter = l * n;
  		return 0.5 * apothem * perimeter;
  	}
  	
  	static double sectorArea(double angle, double r)
  	{
  		return angle / 360.0 * Math.PI * r * r;
  	}
  	
  	static class Scanner 
  	{
  		StringTokenizer st;
  		BufferedReader br;
  
  		public Scanner(InputStream s){	br = new BufferedReader(new InputStreamReader(s));}
  
  		public String next() throws IOException 
  		{
  			while (st == null || !st.hasMoreTokens()) 
  				st = new StringTokenizer(br.readLine());
  			return st.nextToken();
  		}
  
  		public int nextInt() throws IOException {return Integer.parseInt(next());}
  		
  		public long nextLong() throws IOException {return Long.parseLong(next());}
  
  		public String nextLine() throws IOException {return br.readLine();}
  		
  		public boolean nextEmpty() throws IOException
  		{
  			st = new StringTokenizer(br.readLine());
  			return st.countTokens() == 0;
  		}
  		
  		public double nextDouble() throws IOException
  		{
  			String x = next();
  			StringBuilder sb = new StringBuilder("0");
  			double res = 0, f = 1;
  			boolean dec = false, neg = false;
  			int start = 0;
  			if(x.charAt(0) == '-')
  			{
  				neg = true;
  				start++;
  			}
  			for(int i = start; i < x.length(); i++)
  				if(x.charAt(i) == '.')
  				{
  					res = Long.parseLong(sb.toString());
  					sb = new StringBuilder("0");
  					dec = true;
  				}
  				else
  				{
  					sb.append(x.charAt(i));
  					if(dec)
  						f *= 10;
  				}
  			res += Long.parseLong(sb.toString()) / f;
  			return res * (neg?-1:1);
  		}
  		
  		public boolean ready() throws IOException {return br.ready();}
  
  
  	}
  }
  