A book page from the coding sequence of natural numbers starting at 1 until the natural number n. Book page layout according to the usual habits of each page are free of extra leading digit 0. E.g., page 6 represented by six instead of 06 or 006. Digital statistical problem calls for a given total number of pages of the book, calculate all the pages of the book many times, respectively, used in digital 0,1,2,3, ..... 9.

1-1.cpp

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