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#include <iostream>
#include <string>
#include <cmath>
using namespace std;

struct Subject {
    string name;
    int mark;
};

struct Student {
    std::string name;
    Subject subjects[4];
};

int main()
{
    int n;
    cin >> n;
    auto students = new Student[n];
    for (int i = 0; i < n; i++)
    {
        cin >> students[i].name;
        for (int j = 0; j < 4; j++)
        {
            cin >> students[i].subjects[j].name;
            cin >> students[i].subjects[j].mark;
        }
    }
    int result = 0;
    for (int i = 0; i < n; i++)
    {
        bool isFullFive = true;
        for (int j = 0; j < 4; j++)
        {
            if (students[i].subjects[j].mark != 5)
            {
                isFullFive = false;
                break;
            }
        }
        if (isFullFive)
            result++;
    }
    cout << result << endl;

    return 0;
}