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;
		int index = 0;
		while(index != length) {
			if(before[index] != after[index]) {
				if(index == length - 1 || before[index + 1] == after[index + 1]) {
					count++;
				}
			}
			index++;
		}
		System.out.println(count);
	}
}