Length limits on messaging platforms

The venerable SMS system uses a message limit of 160 bytes¹. This was designed so that a message could fit in exactly one packet, thus being really cheap and fast to handle on first-generation mobile phone networks. Although the approach makes sense for technical reasons, it unfairly penalizes people who use non-latin (e.g. Russian, Greek, Japanese) alphabets - in most encodings, they need more bytes per character than latin alphabets.

Twitter used to have a character limit of 140 characters². But this is a limit by design, to emphasize the concise and ephemeral nature of the platform. It's not a technical limitation. So the designers of twitter set the limit at 140 characters, NOT the number of bytes.

You are working for a fictious company named "TOPlap", which sends messages to customers using both SMS and Twitter, via a message broker. The message broker charges a fee for each message sent, as follows:

• For each SMS: 11 cents.
• For each Tweet: 7 cents.
• Discount rate for messages sent as SMS and Tweet together: 13 cents.

Write a program that checks whether messages are valid as SMS and / or valid as (old-style) Tweet³. Your input is a list of messages in different languages, one on each line, in UTF-8 format. The message broker expects UTF-8 format as well. Calculate your total bill with the message broker, assuming that you will not send any messages that are too long. So a message that is valid for the SMS platform, but not as tweet, will only incur the charge of 11 cents for a single SMS message.

Line endings are excluded from byte count as well as character count.

For example, given your test input:

néztek bele az „ártatlan lapocskába“, mint ahogy belenézetlen mondták ki rá a halálos itéletet a sajtó csupa 20–30 éves birái s egyben hóhérai.
livres, et la Columbiad Rodman ne dépense que cent soixante livres de poudre pour envoyer à six milles son boulet d'une demi-tonne.  Ces
Люди должны были тамъ и сямъ жить въ палаткахъ, да и мы не были помѣщены въ посольскомъ дворѣ, который также сгорѣлъ, а въ двухъ деревянныхъ
Han hade icke träffat Märta sedan Arvidsons middag, och det hade gått nära en vecka sedan dess. Han hade dagligen promenerat på de gator, där

• The first message is 162 bytes long and 143 characters long. It's suitable for neither messaging system, so nothing will be sent and the charge is zero.
• The second message is 138 bytes long and 136 characters long. It's suitable for both messaging system, so apply the discount rate of 13 cents
• The third message is 253 bytes long and 140 characters long. It's only suitable as a tweet, and incurs a charge of 7 cents.
• The fourth message is 147 bytes long and 141 characters long. It's only suitable as an SMS message, and incurs a charge of 11 cents.

The solution to the test input would then be 0 + 13 + 7 + 11 totalling 31

What is the total cost of all your messages, in cents?

Reading & reference materials

• Classic article by Joel Spolsky: The absolute minimum every programmer should know about Unicode, no excuses is very relevant for this puzzle.

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