#include <iostream>
using namespace std;
const int N = 1010;
int a[N];
int main(){
    int n;  cin >> n;
    for(int i = 0; i < n; i ++ )    scanf("%d", &a[i]);
    int pre = a[0], cnt = 0;
    for(int i = 1; i < n; i ++ ){
        if(a[i] != pre){
            cnt ++ ;
            pre = a[i];
        } 
    }
    cout << cnt + 1  << endl;
    return 0;
}