package ccf;

import java.util.Scanner;

public class 數列分段 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
        new 數列分段().run();
	}
        public void run(){
        	Scanner sc=new Scanner(System.in);
        	int n=sc.nextInt();
        	int[] a=new int[n];
        	for (int i = 0; i < a.length; i++) {
				a[i]=sc.nextInt();
			}
        	int c=1;
        	for (int i = 0; i < a.length-1; i++) {
				if(a[i]!=a[i+1]){
					c++;
				}
			}
        	System.out.println(c);
        	sc.close();
        }
}