#include <iostream>

using namespace std;

int main() {
  int n, k = 0;
  int a[100];
  bool c;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    if (i != 0 && (a[i] >= 0 != c)) {
      cout << "i = " << i << endl;
      k++;
    }
    c = a[i] >= 0;
  }
  cout << "k = " << k << endl;
  return 0;
}