from collections import Counter


def main():
    n = int(input())
    c = Counter([i * j for i in [2, 3, 5, 7, 11, 13] for j in [4, 6, 8, 9, 10, 12]])
    print(c.get(n, 0) / 36)

    
if __name__ == '__main__':
    main()