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