package sequenceSegmentation;

import java.util.Scanner;

public class Main {
	@SuppressWarnings("resource")
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();// 整數個數
		int result = 1;// 初值為1
		int pre = sc.nextInt();// 記錄前一個數，初值為第一個數
		for (int i = 1; i < n; i++) {
			int cur = sc.nextInt();
			if (cur != pre)// 若與前數不同，則可判斷為新的一段
			{
				result++;
				pre = cur;
			}
		}
		System.out.println(result);
	}
}