import java.util.Scanner;

public class Test {

public static void main(String[] args) {

int m=0;

Scanner si =new Scanner(System.in);

String s1 = si.nextLine();

    int n = Integer.parseInt(s1);
    Scanner sii =new Scanner(System.in);
    String s2 = sii.nextLine();
    String[] sn = s2.split(" ");
    for(int i=0;i<sn.length; i++) {
        if (i==sn.length) break;
        for (int j=i+1; j < sn.length; j++) {
            String mString = sn[i]+sn[j];
            String nString = sn[j]+sn[i];
            int mm = Integer.parseInt(mString);
            int nn = Integer.parseInt(nString);
            if (mm%7==0) {
                m++;
            }
            if (nn%7==0) {
                m++;
            }
        }
    }
    System.out.println(m);
}

}