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Аккаунт удален

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Анатолий Кобец

13.10.2022

Вопрос №19
Про номер телефона.
Мой телефон +4567а567
Буква а в номере- количество бутылок пива которое мы выпили на твоём дне рождения.

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Dart Veider

15.10.2022

Сумма всех цифр. Поможет обнаружить одиночную ошибку, т.е. в одной цифре. Может не обнаружить при числе разрядов ошибки больше 1. Но частота ошибок обратно пропорциональная количеству разрядов ошибки, так что в большинстве случаев приемлемый вариант.
Вообще, есть именно для таких случаев даже специальные алгоритмы, но в уме не сильно применимые.

Алгоритм Луна

Алгоритм Луна (англ. Luhn algorithm) — алгоритм вычисления контрольной цифры номера пластиковой…

ru.wikipedia.org

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