// 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);
}
}