import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		// 入力
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] A = new int[N];
		int[] B = new int[N];
		for(int i = 0; i < N; i++){
			A[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			B[i] = sc.nextInt();
		}
		
		// カウント
		int count = 0;
		if(A[0] != B[0]){
			count++;
		}
		for(int i = 0; i < N-1; i++){
			if(A[i] == B[i] && A[i+1] != B[i+1]){
				count++;
			}
		}
		
		
		// 出力
		System.out.println(count);
	}
}