#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int a[100005];
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  int Count = 1;
  if (n == 1) {
    cout << 1 << endl;
  } else {
    for (int i = 0; i < n - 1; i++) {
      if (a[i] == a[i + 1]) {
        continue;
      } else {
        Count++;
      }
    }
    cout << Count << endl;
  }
  return 0;
}
