def is_number(s):
    """
    Helper function: Check if a string represents a real number
    """
    try:
        float(s)
        return True
    except ValueError:
        return False


def convert_degree(temp, units):
    """
    converts degrees from celsius to fahrenheit.
    :param temp: the temperature to convert.
    :param units: the units to convert from (should be "C" or "F")
    :return: The converted temperature. if the temp is below the absolute 0 the function returns none
    """
    if not is_number(temp):
        return None
    if temp < -273.15 and units == "C":
        return None
    elif temp < -459.67 and units == "F":
        return None
    elif units == "F":
        return (temp * 9 / 5) + 32
    elif units == "C":
        return (temp - 32) * (5 / 9)
    else:
        return None


def natural_language_convert_degree(user_request):
    """
    converts the "user request" to the desire temperature
    :param user_request: user request should be in this format : convert to [celsius|fahrenheit] [degree]
    :return: The converted temperature. if the temp is below the absolute 0 the function returns none
    """
    ans = user_request.split()
    if len(ans) != 4:
        return None
    if not is_number(ans[3]):
        return None
    degree = float(ans[3])
    if ans[2] == "celsius" and degree > -273.15:
        return float(ans[3]), convert_degree(degree, "C")
    elif ans[2] == "fahrenheit" and degree > -459.67:
        return float(ans[3]), convert_degree(degree, "F")
    else:
        return None


def user_input_convert_degree():
    """
    :return:
    """

    maalot_str = input("Please enter degrees: ")
    if not is_number(maalot_str):
        return
    maalot = float(maalot_str)
    yehida = input("Convert to (C)elsius, or (F)ahrenheit: ")
    if yehida == "C":
        return maalot, "in Fahrenheit is ", convert_degree(maalot, yehida), "in Celsius"
    if yehida == "F":
        return maalot, "in Celsius is", convert_degree(maalot, yehida), "in Fahrenheit"
    else:
        return None


#     # fill code here. It is recommended to implement the function 'water_temp_to_state' and call it from here
# # Convert water temperature to state of matter for user input.
# def state_of_matter():
def water_temp_to_state(temp):
    if temp < 0:
        return "Solid"
    if 0 <= temp <= 100:
        return "Liquid"
    if temp > 100:
        return "Gas"
    else:
        return


def state_of_matter():
    """
    User inserts a number between 1 to 3, after this, the user will insert 3 degrees.
    :return:the output will be if the state of the numbers is in gas, liquid or solid for water.
    """
    threenums_str = input("Please enter a number of temperatures (1-3): ")
    if not is_number(threenums_str):
        return
    threenums = float(threenums_str)
    # if not 1 <= threenums <= 3:
    #     return "The number you entered is not between 1 and 3, goodbye!"
    if threenums == 1:
        print("Please enter the temperatures, one in each line")
        deg1_str = input("")
        if not is_number(deg1_str):  # Problem
            return
        deg1 = float(deg1_str)
        return water_temp_to_state(deg1)
    elif threenums == 2:
        print("Please enter the temperatures, one in each line")
        deg1_str = input("")
        deg2_str = input("")
        if not is_number(deg1_str):
            return
        if not is_number(deg2_str):
            return
        deg1 = float(deg1_str)
        deg2 = float(deg2_str)
        print(water_temp_to_state(deg1))
        print(water_temp_to_state(deg2))
    elif threenums == 3:
        print("Please enter the temperatures, one in each line")
        deg1_str = input("")
        deg2_str = input("")
        deg3_str = input("")
        if not is_number(deg1_str):
            return
        if not is_number(deg2_str):
            return
        if not is_number(deg3_str):
            return
        deg1 = float(deg1_str)
        deg2 = float(deg2_str)
        deg3 = float(deg3_str)
        print(water_temp_to_state(deg1))
        print(water_temp_to_state(deg2))
        print(water_temp_to_state(deg3))
    else:
        return "The number you entered is not between 1 and 3, goodbye!"

print(state_of_matter())

    # Test
    # threenums_str = input("Please enter a number of temperatures (1-3): ")
    # if not is_number(threenums_str):
    #     return None
    # threenums = float(threenums_str)
    # if threenums > 3 or threenums < 1:
    #     return "The number you entered is not between 1 and 3, goodbye!"
    # if threenums == 1:
    #     print("Please enter the temperatures, one in each line:)
    #
    # print("Please enter the temperatures, one in each line:")
    # deg1_str = (input(""))
    # deg2_str = (input(""))
    # deg3_str = (input(""))
    # if not is_number(deg1_str):
    #     return None
    # if not is_number(deg2_str):
    #     return None
    # if not is_number(deg3_str):
    #     return None
    # if deg1_str == "":
    #     return None
    # if deg2_str == "":
    #     return None
    # if deg3_str == "":
    #     return None
    # deg1 = float(deg1_str)
    # deg2 = float(deg2_str)
    # deg3 = float(deg3_str)
    # print(water_temp_to_state(deg1))
    # print(water_temp_to_state(deg2))
    # print(water_temp_to_state(deg3))