#include <bits/stdc++.h>
#define ll long long
#define speed ios_base::sync_with_stdio(0); cin.tie(0);
#define mx 1000000000
using namespace std;

    ////////////  //////           //////  /////////////////
  ////       ///  ////////       ////////  ///            //
 ///         ///  ///   ///     ///   ///  ///
///          ///  ///    ///   ///    ///  ///
///          ///  ///     /// ///     ///  /////////
////////////////  ///      /////      ///  ///
///          ///  ///                 ///  ///
///          ///  ///                 ///  ///            //
///          ///  ///                 ///  /////////////////


int main()
{
        //ЗАДАЧА 2
        cout << "vvedite posledovatelnost \n";
        int count = 0;
        string input1 = "";
        vector<bool> a;
        while (getline(cin, input1))
        {
                if (input1.empty())
                {
                        break;
                }
                int tmp = stoi(input1);
                if (tmp>0)
                {
                        a.push_back(true);
                }
                else if(tmp < 0)
                {
                        a.push_back(false);
                }
        }
        for (int i = 1; i < a.size(); i++)
        {
               if(a[i] != a[i-1])
               {
                       count++;
               }
        }
                cout << "vsego znak menalsa " << count << " raz(a)" << endl;
        return 0;
}