Description: Page of this book started from the natural number 1 until the natural number sequence encoding n. Book page layout in accordance with the usual habits, each page number are non-redundant leading figure 0. For example, the first six figure 6 with express, rather than 06 or 006 and so on. Count the number of questions asked of a given book' s total page number n, to calculate the full book page number in the number of times used separately figure 0,1, 2, ..., 9
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课本第一章
..........\1.rar
..........\1.txt
..........\2.txt
..........\3.txt
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