Team

#include <iostream>
using namespace std;
 
int main() {
	int num = 0;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		int a, b, c;
		cin >> a >> b >> c;
		if (a + b + c >= 2) { num++; }
	}
	cout << num << '\n';
}

import java.io.*;
import java.util.*;
public class Team {
	public static void main(String[] args) {
		Kattio io = new Kattio();
		int num = 0;
		int n = io.nextInt();
		for (int i = 0; i < n; i++) {
			int a = io.nextInt();
			int b = io.nextInt();
			int c = io.nextInt();
			if (a + b + c >= 2) { num++; }
		}
		io.println(num);
		io.close();
	}
	// CodeSnip{Kattio}
}

sols = 0
for _ in range(int(input())):
	sols += sum(int(i) for i in input().split()) >= 2
print(sols)