#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,a[1000],i,c=0;
    cin>>n;
    for(i = 1;i <= n;i++){
    	cin>>a[i];
	}
	for(i = 1;i < n;i++){
		if(a[i] != a[i+1]) c++;
	}
	
	if(a[n] != a[1]) c++;
	cout<<c;
    return 0;
}
/**************************************************************
	Problem: 1805
	User: admin
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/