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