#include <iostream>
using namespace std;


int main()
{
    int n;
    cin >> n;

    int niza[n];
    for(int i = 0; i < n; i++) {
        cin >> niza[i];
    }

    int smenet_znak = 0;
    for(int i = 0; i < n; i++) {
        if(niza[i] < 0) {
            while(i < n and niza[i] < 0) {
                i++;
            }
            smenet_znak++;
            i--;
        }
        else {
            while(i < n and niza[i] > 0) {
                i++;
            }
            smenet_znak++;
            i--;
        }

    }
    cout << smenet_znak << endl;
    return 0;
}