#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, res = 1;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; i++) cin >> a[i];
  for (int i = 1; i < n; i++)
    if (a[i] != a[i - 1]) res++;
  cout << res;
}
