#include <iostream>

using namespace std;

const int N = 1010;

int a[N];

int main()
{
    int n;
    cin >> n;
    for(int i = 1; i <= n; i++) cin >> a[i];
    int res = 0;
    for(int i = 1; i <= n; i++)
    {
        if(a[i] != a[i - 1]) res ++;
    }
    cout << res;
    return 0;
}