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Discussion of Problem 1009. K-based Numbers

Почему в случае 1 10 ответ 9 если 0 тоже число в котором не идут два подряд ноля?

Просто 2 раза получил ВА, поменял на 9 и АС.
You are wrong. In case 1 10 you have exactly nine 1-digit numbers without two or more subsequent zeros. They are: 1,2,3,4,5,6,7,8 and 9.
What do you mean? '0' is *also* a 1-digit number without two or more subsequent zeroes, no?

Also, yay for necroposting!