A. Team Solution

#include<bits/stdc++.h>

using namespace std;

int main()

{

         int n,a,b,c;

         int flag=0;

         cin>>n;

         while(n--){

                 cin>>a>>b>>c;

                 if (a+b+c >= 2)

                 flag++;

                

         }

         cout<<flag<<endl;

         return 0;

}