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