using System;

using System.Linq;  

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        minimumBribes(new List<int>{ 2, 5, 1, 3, 4, });

    }

     public static void minimumBribes(List<int> q)

    {

       int count = -1;

       for(int i=1;i<=q.Count();i++){

           if(i!=q[i-1]){

               count++;

           }

       }

        Console.WriteLine(count);

    }

}