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

    ans = 0
    for i in range(n // 5 + 1):
        for j in range(i + 1):
            for k in range(n // 3 + 1):
                if i * 5 + j * 2 + k * 3 == n:
                    ans += 1
    print(ans)


if __name__ == "__main__":
    main()