import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.lang.System.in;


public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        int K = Integer.parseInt(reader.readLine());
        int[] primes = new int[]{2, 3, 5, 7, 11, 13};
        int[] composites = new int[]{4, 6, 8, 9, 10, 12};
        double totalCombinations = 36;
        int counter = 0;
        for (int i = 0; i < 6; i++) {
            int x = primes[i];
            for (int j = 0; j < 6; j++) {
                int y = composites[j];
                if ((K%x) == 0 && y == K / x) {
                    counter+=1;
                }
            }
        }
        System.out.println(counter/totalCombinations);
    }
}