from itertools import count


def calc_try_and_conversion(point: int) -> int:
    ctr = 0

    for conversion in count():
        rest_point = point - 7 * conversion
        if rest_point < 0:
            break
        if rest_point % 5 == 0:
            ctr += 1
    return ctr


def main():
    N = int(input())

    patterns = 0
    for penalty_goal in count():
        rest_point = N - 3 * penalty_goal
        if rest_point < 0:
            break

        patterns += calc_try_and_conversion(rest_point)

    print(patterns)


if __name__ == "__main__":
    main()