#include <iostream>
#include <vector>

using namespace std;

int main()
{
    int n = 0;
    vector< vector<double> > a;
    vector<double> b(8); 
    
    for (; cin >> b[0] >> b[1] >> b[2] >> b[3] >> b[4] >> b[5] >> b[6] >> b[7]; ) {
        n++;
        a.push_back(b);
    }

    
    cout << n << endl;
    return 0;
}