A_Team.cpp

#include<bits/stdc++.h>
using namespace std;

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define nline "\n" 
#define fo(i,n) for(int i = 0;i<n;i++)
#define int long long
#define pb push_back
#define F first
#define S second
typedef long double ld;
typedef vector<signed> vi;
typedef vector<vector<signed>> vvi;
typedef vector<int> vll;
typedef vector<vector<int>> vvll;
const int mod = 1e9+7;
long double pi = acos(-1.0); const double EPS = 1e-9;

int myceil(int a , int b){return (a+b-1)/b;}
int myround(int a , int b){return (2*a+b)/(2*b);}

/* int solve(){
    int sum =0;
    for( int i = 0; i < 3; ++i){
        int x;cin>>x;
        sum+=x;
    }
    return sum;
} */

void solve(){
    int n,ans = 0;
    cin >> n;
    for( int i = 0; i < n; ++i){
        int a , b , c;
        cin >> a >> b >> c;
        if( a + b + c >= 2){
            ans++;
        }
    }
    cout << ans;
    
}

signed main(){
    IOS;

    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout); 
    #endif

    /* //Let's Code
    int t,sol=0;
    cin>>t;
    while(t--){
        if(solve()>=2){
            sol++;
        }
    }
    cout << sol; */
    solve();
    return 0;


}