using System;
using System.Linq;
using System.Collections.Generic;
class Program
{
	static int winCount = 0;
	static int winConparison = 0;
	static double standard = 0;
	
    static void Main(string[] args)
    {
    	int n = int.Parse(Console.ReadLine());
    	var aList = Console.ReadLine().Split(' ').Select(c => int.Parse(c)).ToList();
    	
    	var bList = Console.ReadLine().Split(' ').Select(c => int.Parse(c)).ToList();
    	
    	standard = n / 2.0;
    	int patternNum = 1;
    	for(int i = n;i > 0;i--)
    	{
    		patternNum *= i;
    	}
    	winCheck(aList,bList);
    	
    	Console.WriteLine((double)winCount / patternNum);
    	Console.WriteLine($"{winCount},{patternNum},{winConparison},{standard}");
    	
    	
    }
    
    static void winCheck(List<int> aL,List<int> bL)
    {
    	int tempConparison = winConparison;
    	
    	for(int i = 0;i < bL.Count;i++)
    	{
    		var tempA = new List<int>(aL);
    		var tempB = new List<int>(bL);
    		
    		if(tempA[0] > tempB[i])
    		{
    			Console.WriteLine($"{tempA[0]},{tempB[i]}");
    			Console.WriteLine($"wc {winConparison}");
    			winConparison++;
    		}
    		
    		tempA.RemoveAt(0);
    		tempB.RemoveAt(i);
    		
    		if(tempB.Count == 0)
    		{
    			
    			if(winConparison > standard)
    			{
    				Console.WriteLine(winConparison);
    				winCount++;
    			}
    			break;
    		}
    		winCheck(tempA,tempB);
    		winConparison = tempConparison;
    	}
    	
    	
    	
    }
    
    
    
    
}