import java.util.Scanner;
public class Main{
public static void main (String[] args){
try (Scanner in = new Scanner(System.in)) {
	int x = in.nextInt();
	int a,b,c;
	long y,d;
	 if( x >= 100 && x <1000) {
		 a = x / 100;
		 b = x / 10 % 10;
		 c = x % 10;
		 y = a * 100000 + b * 10000 + c * 1000 + x;
		 d = y / 7 / 11 / 13;
		 System.out.println(d);
	 }
	 }
}
}
/**************************************************************
	Problem: 1961
	User: admin
	Language: Java
	Result: Accepted
	Time:787 ms
	Memory:40140 kb
****************************************************************/