#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a[100000], b = 0;
  cin >> n;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  for (int i = 1; i <= n; i++) {
    if (a[i] != a[i + 1]) b++;
  }
  cout << b;
  return 0;
}
