using System;

using System.Collections.Generic;

public class PaperStrip

{

    public static int MinPieces(int[] original, int[] desired)

    {

        int cuts = original.Length;

        for(int i=0; i<original.Length;++i)

        {

            if(original[i]==desired[i])

            {

                int matchCount =1;

                int j = i+1;

                while(j<original.Length &&  original[j]==desired[i])

                {

                    matchCount++;

                }

                // see how long this is             

                cuts -= matchCount;                             

            }

        }

        return cuts;

    }

​

    public void MakeSwitch(int[] original, int[] desired, int i)

    {

        //var originalN = original[i];

        //var desiredN = desired[i];

    }

    public static void Main(string[] args)

    {

        int[] original = new int[] { 3, 4,2, 1};

        int[] desired = new int[]  { 4, 3, 2, 1 };

        Console.WriteLine(PaperStrip.MinPieces(original, desired));

    }

​

}