数列分段

// package csp;
import java.util.*;
import java.io.*;

public class Main {
	public static int N=1010;
	public static int a[]=new int [N];
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner cin=new Scanner(new BufferedInputStream(System.in));
		int n=cin.nextInt(),cnt=0,mx=-1;
		for(int i=1;i<=n;i++)
		{
			a[i]=cin.nextInt();
			if(a[i]!=a[i-1]&&i>1) {
				cnt++;
			}
		}
		System.out.println(cnt+1);
	}

}