#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: wangyiyang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/