#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int arr[n + 5];
  int g = 1;
  for (int i = 0; i < n; i++) cin >> arr[i];
  for (int i = 1; i < n; i++) {
    if (arr[i] != arr[i - 1]) g++;
  }
  cout << g;
}
