package no174a;

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = 10000 * (int) Math.pow(10, sc.nextInt());
		long sum = 0;
		for(int i=0;i<n;i++) {
			sum += Integer.numberOfTrailingZeros(Integer.bitCount(n));
		}
		System.out.println(0);
		//System.out.println(sum);
	}
}