1.9.3

import java.util.Scanner;
public class main {
        static void Owo (int n) {
            int b = 0;
            int ab = 0;
            int c = 0, a = 0;
            for (int i = 100; i < n; i++) {
                if (((i / 100) + (i % 100 / 10) + (i % 100 % 10)) % 13 == 0){
                    ab = ab + 1;
                }
            }
            System.out.println(ab);
        }
        public static void main(String args[]) {
            Scanner sc = new Scanner(System.in);
            int n = sc.nextInt();
            Owo(n);
        }

    }