#include <iostream>
using namespace std;

int a,
    u,
    f,
    arr[100][3];

///////////////////////////////////////////////////
int main()                                      //
{

 cin >> a;

 for(int i = 0; i < a; i++)
 {
     cin >> arr[i][i];

     f += arr[i][i] %  10;
          arr[i][i] /= 10;
     f += arr[i][i] %  10;
          arr[i][i] /= 10;
     f += arr[i][i] %  10;

     cout << f << endl;

     if(f >= 2) u++;

     f = 0;
 }

     cout<< u << endl;

}