ц 402

#include <iostream>
#include <string>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int kol = 0,u=0;
    string s;
    cin.ignore();
    for (int i = 0; i<n; i++)
    {
        getline(cin, s);
        int g = 0;
        int q = 0;
        for (int y = 0; y<s.length() - 1; y++)
        {
            string s1 = "..";
            if (s.compare(y, 2, s1) == 0)
                g++;
            if (s[y] == '@') u++;
        }
        if ((u>1)||(s[0] == '@') || (s[s.length() - 1] == '@')) q++;
        if ((g == 0) && (q == 0))
        {
            kol++;
        }
        s.erase(0, s.length() - 1);
    }
    cout << kol << endl;
    return 0;
}