import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int[] before = new int[length];
		for(int i = 0; i < length; i++) {
			before[i] = sc.nextInt();
		}
		int[] after = new int[length];
		for(int j = 0; j < length; j++) {
			after[j] = sc.nextInt();
		}
		int count = 0;
		if(before[0] != after[0]) {
			count++;
		}
		for(int i = 0; i < length - 1; i++) {
			if(before[i] == after[i] && before[i + 1] != after[i + 1]) {
				count++;
			}
		}
		System.out.println(count);
	}
}