import java.util.Scanner;

public class HelloWorld{

    public static int sum(int n) {
        int k = 0;
        for (int i=139;i<n;i++) {
            int y = i / 100 + i % 100/10 + i % 10;
            if (y%13==0){
                k+=1;
            }
        }
        return k;
    }

     public static void main(String []args){
          Scanner in = new Scanner(System.in);
          int x = in.nextInt();
          System.out.println(sum(x));
     }
}