#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,g;
	cin>>n;
	int a[n];
	for(int i=0;i<=n-1;i++){
		cin>>a[i];
	}
	for(int i=0;i<=n-1;i++){
		if(a[i]!=a[i+1]) g++;
	}
	cout<<g;
}
/**************************************************************
	Problem: 1805
	User: wangyiyang
	Language: C++
	Result: Wrong Answer
****************************************************************/